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 area of a triangle

 The goal of this post is to give you several methods for finding the area of a triangle and a video that goes with each method. The method used to find the area is based on the information you are given.

 

If you know the Base and Altitude use      half base times height

 Video half base times height

 If you don’t know the altitude    use  Heron’s formula

 Video Heron's formula

 If you know Two sides and included angle     use Side Angle Side ( SAS)

 Video Side angle side

 

If you know X and Y vertices of the corners  use Box Method

 Video Box Method

 

 If you know Triangle is equilateral   use    Equilateral Triangle Area

 

 Video Equilateral Area Method

 If you know Triangle is isosceles     use    ½ base times height

 Video Half base * height

 

For even more information on finding the area of a triangle please see.Finding the area of a triangle