Geometry Help-Circles-Tangent and Radius-MooMooMath

MooMooMath provides helpful Geometry videos. In this video tangent and radius of a circle is covered.When you combine the radius of a circle, along with the point of tangency, a right triangle can be created. The Pythagorean Theorem can be used to calculate missing parts of the triangle and circle, along with the tangent lengths. These measurements include leg length,circle radius, and the hypotenuse.

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Surface Area of a Rectangular Prism-Geometry Help

Step by step directions for finding the surface area of a rectangular prism measuring 5 units by 5 units by 4 units

Questions answered this video..
How do you find the total surface area of a rectangular prism?

How do you find the area of the top and bottom of a rectangular prism?
How do you find the area of the sides of a rectangular prism?

If you have a rectangular prism with sides of 4 units and a top of 5 units in length?

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Finding the area of a circle and the sector area

The video explains how to find the area of a sector and how to find the sector area of a circle. Please see the video guide for more detail.

Circles part 2 lesson 4

Video Guide
00:13 Definition of a sector
00:35 Formula for area of a circle
00:40 Sample problem- finding the area of a circle when given the radius
01:26 Sample problem - finding the area of a circle when given the diameter
02:21 Formula for area of a sector reviewed and explained
03:48 Sample problem - find the area of a sector
04:50 Sample problem - find the area of a sector
06:29 Sample problem- find the area of a circle given the sector area
09:20 Sample problem - find the radius of a circle given a central angle and the sector area

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Congruent triangles-Geometry Help

Introduction to congruent triangles. This 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.

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Finding the surface area and the volume of a sphere

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Slope intercept form explained.

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What is absolute value?

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