Video of the Day " Absolute Value Inequalities"

Today's video reviews how to solve absolute value inequalities. The video gives step by step directions for solving |3x – 5| ≥ 4

A quick overview of solving absolute value inequalities is as follows:

• Set up two cases
• Rewrite without the absolute value bar
• Solve the inequalities
• Place on a number line

Solve

|3x – 5| ≥ 4

For more information on Absolute Value Inequalities see:

MooMooMath Absolute Value Inequalities

Video of the Day " Trigonometry Unit"

If you need help in trigonometry I have put together a trigonometry unit. This is one video of the trigonometric unit that contains 14 videos, along with a note taking guide for each video, Click here for the table of contents: Trig Unit

Video Guide
0:30 Definition of the trig ratios
2:42 Learning how to use the trig functions
Reviewing the steps
1.  Find the reference angle.
2. Label OPPOSITE, ADJACENT, HYPOTENUSE
3. Which two do you have?  Which function is it?
4. Set up the ratio
5. Solve it!
5:11 Practice problem 1 Deciding the functions
6:30 Practice 2 Find opposite side using tangent
7:45 Practice problem 3 Using cosine
9:53 Solving Tan 52/1 = x/12
12:33 Solving Sin 48/1=x/17
13:39 Solving Tan72/1 = x/34
15:03 Solving Cosine 25/1  = 7/x
17:22 Reviewing using trig functions

Video of the Day " Finding the Area of an Isosceles Triangle"

Finding the area of a triangle of an isosceles triangle. The formula for area of a triangle is 1/2 base times height.

Step 1. Determine your base
Step 2. Find the altitude
Step 3. You can find the height by creating a right triangle by drawing a line from your vertex.
Step 4. Use the Pythagorean Theorem to determine the missing leg of the right triangle which will be your height.
Step 5. Plug the altitude (height) into 1/2base x height

For more information on area of triangle see
http://www.moomoomath.com/Finding-the-area-of-a-triangle.html#.Ul861VCsiSo

Video of the Day "Solving Equations"

Today I'm including several videos that solve equations.
List of equations solved.

Equations containing radicals

Equations containing absolute values

Quadratic Equations

Equations in volving rationals

How to Simplify Radicals Video

Equations with Absolute Values

Quadratic Equations

Equations involving a rational

For sample problems and more information see
MooMooMath/Equations

Video of the Day " Reducing a Fraction"

Reducing Fractions
Hello welcome to MooMooMath. Today we are going to talk about how to reduce fractions and I'm going to show you two methods. There is a second video that goes over a different method of reducing fractions. So pick the one you like best. So let's start with twenty four over thirty six. I know that both of those numbers are divisible by two. Let's reduce to this ( twelve over eighteen) I can reduce again, I notice there is another common factor so I reduce again and reduce it all the way down to two thirds. So that is method one where you are looking for common factors. So what method did I use? The first step is to find any common factor, and just start factoring or reducing by dividing the numerator and the denominator by that factor, and then you try it again. You continue this until you don't have any more common factors. So let's try a second problem using the same method. I'm going to start with 108 and 144. I notice that both of those numbers are even so I'm going to start with two and divide the numerator and the denominator by two. So that gives 54 over 72. I notice I have even numbers again so I can divide by two again. When I divide by two I get 27 over 36. I notice I have common factors of three so I divide the top and bottom numbers by three and I get 9 over 12. I can then further reduce by three and end up with three fourths. So I just find a common factor and continue to reduce it down until I get the smallest form. Hope this method was helpful.

For more information on fractions see: MooMooMath/Fractions

Video of the Day "Slope of Line"

Today I have two videos posted on slope. These are very basic videos on slope,but you have to learn to walk before you can run.

Video 1
When a line has a negative slope the line slopes downward when you move from left to right. Notice that as y decreases, x increases. When a line has a negative slope the two variables move in opposite directions. Video explains and demonstrates a negative and positive slope of a line.

Video 2
What is an undefined slope and what does it look like on a graph. The video goes what a line looks like that has an undefined slope and why.

For more information and a helpful slope calculator see:  Slope Calculator

Video of the Day "Area of sector of a Circle"

How to find the area of a sector of a circle.

This video gives step by step directions for finding the area of a sector of a circle. Think of the sector of a circle as a pizza slice of a circle.
In order to find the sector area  use the formula:

Measure of the central Angle/360*pi* radius squared

For more information and an area of a sector calculator see MooMooMath/Area of Sector

Video of the Day " Trig Ratios"

This video gives you a simple step by step guide for using trig ratios in order to find missing angles or legs of a right triangle .

The trig ratios are as follows:

  

Sine Function	sin(θ)	Opposite / Hypotenuse
Cosine Function	cos(θ)	Adjacent / Hypotenuse
Tangent Function	tan(θ)	Opposite / Adjacent

For more information on trig ratios and a trig calculator

Trig Ratios/MooMooMath

Video of the Day " Solving word problems with proportions"

Step by step directions for solving Math word problems involving proportions and a video.

In order to solve word problems with proportions you first set up a proportion.

Next, set up a second ratio with the same information on the numerator and denominator.

 Finally, set these ratios equal, and then cross multiply  

I understand this doesn't involve Geometry, but I recently had some questions about this topic.

For more videos,an applet, and more example problems please see Proportion Word Problems

Video of the Day " Percent increase and decrease word problems"

This video gives directions for solving percent increase and decrease word problems:

Example percent increase word problems.

Bob bought a bike for $40, and he sold it for $60.  He made a profit of what percent?
A cell phone was reduced from $120.00 to $80.  The phone was marked down what percent?

Drew's followers on FB increased from 200 followers to 600 followers. By how much did his number of followers increase?

For more video tutorials,example problems, and a percent increase calculator please see
Percent and Decrease word problems

Video of the Day " Writing Linear Equations"

Writing Linear Equations

If given two points on a line how do you write the linear equation for the line?
Given (3,1) and (7,4) write a linear equation

Step 1 Find slope
Step 2 Plug the slope into the linear equation solve for b
You can use any pair of the given points.

Writing Linear Equations

Video of the Day Circles Unit " Angles Inside and Outside"

Circles Part 1 Lesson 8

Angles Inside and Outside
Video Guide
00:43 Central angle and arc measures defined and illustrated
01:12 Inscribed angles and angles with the vertex on the circle defined and illustrated
02:20 Definition and explanation along with an illustration of an angle inside the circle but not central
04:00 Sample problem- Finding the measure of an inside angle given two arc measures.
05:04 Angles outside a circle defined and illustrated
06:10 Formula for finding the measure angle of an angle outside the circle
07:05 Helpful hint for when to add and when to subtract the inside and outside arcs
8:27 Question 1 Find x and m angleBEC
8:50 Question2 .  Find m angleBDC
9:24 Question 3 Find the arc measure, z.
10:50 Question 4 Find the arc measure, z and m angle1.
12:20 Question 5 Given m angle ABC = 65o and m angleDFE = 25o
Find measure of arc AC, x and the measure arc DE, y.

Find the note taking guide here Circles Lesson 8


                                             

Video of the Day " Probability of Independent Events"

How to calculate the probability of independent events.

How to calculate the probability of two independent events.Independent events do not have any impact one another.
What is the probability of drawing a star from group one and an arrow from the second group.?
Calculate the probability of event one and multiply this by the probability of the second event.

For more information see Probability/MooMooMath

Video of the Day " Solving Systems of Equations by Graphing"

Solving Systems of Equations by Graphing

Step by step directions for finding a solution to a systems of equations by graphing.
Video Guide
0:10 Start with 2x + y=8 and x-y=4
0:21 Overview of the step by step directions
0:49 Solve for y for the equation  2x+y = 8
1:12 Graph this equation
1:44 Solve for y for x-y=4
2:27 Graph this equation
2:48 Discover where the two lines intersect
3:07 Solution
3:09 Check your solution by plugging the solution into the original equations

For more on Solving systems of equations see MooMooMath/systems of equations

Video of the Day " Spheres: Definition and Finding Area and Volume"

Circles Part 2 Lesson 6
Spheres

Note taking guide

Video Guide

0:09 Definition of a sphere

0:42 An example of the definition of a sphere

1:16 Radius of a sphere explained.

2:58 The great circle explained with an illustration

3:28  Definition of hemisphere and a brief explanation of hemisphere

3:49 Formula for surface area of a sphere

4:16 Formula for volume of a sphere

4:40 Sample problem with step by step instruction over how to find surface area of a sphere.with an exact answer and a rounded decimal.

6:55 Example problem with step by step instructions for finding the volume of a sphere.

Video of the Day " Finding the Surface Area of an Octagonal Prism"

How to find the surface area of an octagonal prism
Use the formula: Two times the base area + Lateral area
Step 1. In order to find the base area you will need to find the apothem using the central angle and then trig to find the apothem.
Step 2. Plug the apothem into 1/2*apothem*perimeter = base area
Step 3. Multiply the perimeter times height for the lateral area
Step 4  Add step 2 ( base area)and step 3 ( lateral area) for your surface area

Please visit our website
http://www.moomoomath.com/

Video of the Day " Rules for Dividing Exponents"

Video Guide for " Rules for Dividing Exponent

00:21 Rules for dividing exponents
00:48 Example problem dividing exponents
01:11 Example problem number 2 dividing exponents
02:22 Rules for negative exponents when dividing
02:36 Rules for dividing radicals and a sample problem
03:17 Rules for dividing rationals
04:34 Rules for dividing negative exponents with samples problems
05:40 Rules for simplifying a fourth root
06:18 Sample problem of simplifying a fourth root
07:46 Sample problem of simplifying a fourth root number 2
09:36 Rules for dividing exponents that are fractions

For many more videos covering exponents see Exponents

Video of the day " Volume of a sphere"

Step by step directions for finding the volume of a sphere
Use the formula 4/3pi radius cubed     4/3πr^3
Find the volume of a sphere with a radius of 6
Plug 6 into the formula  4/3π6^3
This gives you 288π^3  (Units of volume are cubed)

For more videos visit our You Tube Channel or MooMooMath.com

Video of the Day " Surface Area of a Hexagonal Prism"

Step by step directions for finding the surface area of a hexagonal prism.
Video Guide
00:11 Definition of a hexagonal prism
0:28 Overview of how to find the surface area
0:31 Formula for finding the area of the base of the prism
0:46 Directions for finding the lateral area
1:04 Looking at the hexagon as if it is layed out flat
1:27 Working an example problem,finding the base area first
3:18 Finding the area of the sides using perimeter times the height
3:58 Adding the base area plus the side area for the surface area

Visit or Subscribe our You Tube Channel for many more videos

Video of the Day " New MooMooMath You Tube Trailer

I finally got around to creating a new You Tube trailer for my channel. It is just a basic power point converted to a video, but I think it turned out pretty good

For a list of all my videos see A-Z Video List

Video of the Day " Congruent Triangles"

Video explains five methods for proving that triangles are congruent. The five methods for triangle congruence are
SSS Side Side Side

SAS Side Angle Side

ASA Angle Side Angle

AAS Angle Angle Side

HL Hypotenuse Leg
In addition each method has several examples and explains why the triangles are congruent along with tips and guidance from a veteran Geometry teacher.

For more information see:  Congruent Triangles

Video of the Day " Surface area of a cone"

Think of surface area of a cone as how much ice cream you can stuff in an ice cream cone Surface area of a cone explained. The surface area of a cone is found by finding the lateral area and adding this to the base area.

Surface area of a cone

Video of the Day " Perimeter of a Rectangle"

Enjoy these two videos that cover finding the perimeter of a rectangle.

For more information please see: Perimeter of a rectangle

Video of the Day " Percentage word problems"

The video gives instruction on solving the following percentage word problems:

Thirty students took a Math test. If only five of these students passed the test, what percent failed?

Drew received an 80% on his EOCT Math test. The test had 200 questions on it. How many questions did Drew get incorrect?

There are thirty students in a class. Twenty of those students are female.
What percent of the class are female?

Kate bought a new dress at 85% of the regular price.
After the discount of 85% she paid $20.00 for the dress. What was the regular price?

For more information see Percentage word problems

Video of the Day " Solving word problems using the Pythagorean Theorem"

Word problems that are solved using the pythagorean theorem.

Problem 1. A wire is stretched from the top of a 12 foot pole to a stake 5 feet from the base of the pole. How long is the wire?

Problem 2. Find the height of a parallelogram with sides of 17 units by 15 units.

For more information on solving Pythagorean word problems see:
http://www.moomoomath.com/The-pythagorean-word-problems.html