#### DESCRIPTION:

For a complete lesson on proving triangles are congruent, go to http://www.yourteacher.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn the following postulates related to congruent triangles and triangle proofs. If the three sides of one triangle are congruent to the three sides of another triangle, then the triangles are congruent (Side-Side-Side or SSS). If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the triangles are congruent (Side-Angle-Side or SAS). If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the triangles are congruent (Angle-Side-Angle or ASA). Students are then asked to determine whether given triangles are congruent, and name the postulate that is used.

#### OVERVIEW:

Proving Triangles are Congruent - YourTeacher.com - Math Help is a free educational video by yourteachermathhelp.It helps students in grades 9,10,11,12 practice the following standards HSG.CO.C.10.

This page not only allows students and teachers view Proving Triangles are Congruent - YourTeacher.com - Math Help but also find engaging Sample Questions, Apps, Pins, Worksheets, Books related to the following topics.

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1. HSG.CO.C.10 :** Prove theorems about triangles. Theorems include: measures of interior angles of a triangle sum to 180°; base angles of isosceles triangles are congruent; the segment joining midpoints of two sides of a triangle is parallel to the third side and half the length; the medians of a triangle meet at a point..

GRADES:

**9101112**

STANDARDS:

**HSG.CO.C.10**