# How do you test for congruent triangles?

## How do you test for congruent triangles?

Two triangles are said to be congruent if and only if we can make one of them superpose on the other to cover it exactly. 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).

## What are the five tests for congruent triangles?

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

• SSS (side, side, side) SSS stands for “side, side, side” and means that we have two triangles with all three sides equal.
• SAS (side, angle, side)
• ASA (angle, side, angle)
• AAS (angle, angle, side)
• HL (hypotenuse, leg)

Is AAA a congruence criteria for triangles?

Four shortcuts allow students to know two triangles must be congruent: SSS, SAS, ASA, and AAS. Knowing only angle-angle-angle (AAA) does not work because it can produce similar but not congruent triangles.

### What is AAA congruence rule?

may be reformulated as the AAA (angle-angle-angle) similarity theorem: two triangles have their corresponding angles equal if and only if their corresponding sides are proportional.

### What is an example of a congruent shape?

Usually, we reserve congruence for two-dimensional figures, but three-dimensional figures, like our chess pieces, can be congruent, too. Think of all the pawns on a chessboard. They are all congruent. To summarize, congruent figures are identical in size and shape; the side lengths and angles are the same.

How would prove these triangles are 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.

## What triangles are congruent if they have the same?

As with plane triangles, on a sphere two triangles sharing the same sequence of angle-side-angle (ASA) are necessarily congruent (that is, they have three identical sides and three identical angles). This can be seen as follows: One can situate one of the vertices with a given angle at the south pole and run the side with given length up the prime meridian.

## Can the two triangles be proved congruent?

It is clear that the two triangles cannot be congruent because they can have different sizes. What does this mean? It means that just because two triangles have congruent corresponding angles, it does not prove the triangles are congruent . Triangles like this that are the same shape but different sizes are called similar triangles.

Which triangles in the diagram are congruent?

If three sides of one triangle are equal to three sides of another triangle, then the triangles are congruent. In the diagrams below, if AB = RP, BC = PQ and CA = QR, then triangle ABC is congruent to triangle RPQ. Side-Angle-Side is a rule used to prove whether a given set of triangles are congruent.