Congruent Triangles Flashcard Practice

Front

What type of triangle has one angle that measures more than 90°?

Back

Obtuse Triangle

Front

What is the definition of congruent triangles?

Back

Triangles that have the same size and shape, meaning their corresponding sides and angles are equal.

Front

What is the criteria for triangle congruence by Side-Angle-Side (SAS)?

Back

If two sides and the included angle of one triangle are equal to two sides and the included angle of another triangle, the triangles are congruent.

Front

What is the criteria for triangle congruence by Angle-Side-Angle (ASA)?

Back

If two angles and the included side of one triangle are equal to two angles and the included side of another triangle, the triangles are congruent.

Front

What is the criteria for triangle congruence by Angle-Angle-Side (AAS)?

Back

If two angles and a non-included side of one triangle are equal to two angles and the corresponding non-included side of another triangle, the triangles are congruent.

Front

What is the criteria for triangle congruence by Hypotenuse-Leg (HL)?

Back

In right triangles, if the hypotenuse and one leg of one triangle are equal to the hypotenuse and one leg of another triangle, the triangles are congruent.

Front

What is an acute triangle?

Back

A triangle where all three angles are less than 90°.

Front

What is a right triangle?

Back

A triangle that has one angle measuring exactly 90°.

Front

What is the sum of the interior angles of a triangle?

Back

180°.

Front

If two angles of a triangle are known, how can you find the third angle?

Back

Subtract the sum of the known angles from 180°.