## What are the 5 theorems or postulates that prove triangles congruent?

There are five ways to find if two triangles are congruent: SSS, SAS, ASA, AAS and HL.

**What are the triangle congruence postulates and theorems?**

Congruent triangles are triangles with identical sides and angles. The three sides of one are exactly equal in measure to the three sides of another. The three angles of one are each the same angle as the other.

**What are the congruent triangle theorems?**

Two triangles are said to be congruent if they have same shape and same size. When triangles are congruent corresponding sides (sides in same position) and corresponding angles (angles in same position) are congruent (equal).

### What are the 4 theorems used to show congruence of triangles?

These four criteria used to test triangle congruence include: Side – Side – Side (SSS), Side – Angle – Side (SAS), Angle – Side – Angle (ASA), and Angle – Angle – Side (AAS). There are more ways to prove the congruency of triangles, but in this lesson, we will restrict ourselves to these postulates only.

**What are the three methods of proving triangles congruent?**

Methods of proving triangles are congruent: Side-Side-Side (SSS) – we have to prove that all three sides are congruent. Side-Angle-Side (SAS) – what’s very important here is that the “Angle” is written between the two sides. Angle-Side-Angle (ASA) – just like the “angle” in SAS is in between two sides; the “Side” here should also be in between two angles.

**How do you calculate congruent triangles?**

There are five ways to find if two triangles are congruent: SSS, SAS, ASA, AAS and HL. SSS stands for “side, side, side” and means that we have two triangles with all three sides equal. For example: (See Solving SSS Triangles to find out more) If three sides of one triangle are equal to three sides of another triangle, the triangles are congruent.

## What are the postulates of a triangle?

In Euclidean geometry , the triangle postulate states that the sum of the angles of a triangle is two right angles.

**Does side-side-angle prove triangle congruence?**

Side-Angle-Side is a rule used to prove whether a given set of triangles are congruent. The SAS rule states that. If two sides and the included angle of one triangle are equal to two sides and included angle of another triangle, then the triangles are congruent.