Triangle Congruence and Properties

Front

SSS Postulate

Back

If three sides of one triangle are congruent to three sides of a second triangle, then the triangles are congruent.

Front

SAS Postulate

Back

If two sides and the included angle of one triangle are congruent to two sides and the included angle of a second triangle, then the triangles are congruent.

Front

Definition of Congruent Polygons

Back

Two polygons are congruent if and only if their corresponding parts are congruent.

Front

Third Angles Theorem

Back

If two angles of one triangle are congruent to two angles of a second triangle, then the third angles of the triangles are congruent.

Front

Definition of an Isosceles Triangle

Back

A triangle with at least two congruent sides.

Front

Definition of an Equilateral Triangle

Back

A triangle with all sides congruent.

Front

Definition of an Equiangular Triangle

Back

A triangle with all angles congruent.

Front

Definition of an Acute Triangle

Back

A triangle with all angles less than 90 degrees.

Front

Definition of an Obtuse Triangle

Back

A triangle with one angle greater than 90 degrees.

Front

Definition of a Scalene Triangle

Back

A triangle with no congruent sides.