Unit T - Vocabulary

2025 - Mr. Brown

Isosceles Triangle Base Angle Theorem (and Converse)

If two sides (legs) of a triangle are equal, the angles opposite them (base angles) are also equal; the converse says if two angles are equal, the sides opposite them are equal

CPCFC (Corresponding Parts of Congruent Figures are Congruent)

If 2 figures are congruent, then all corresponding angles and sides are congruent

Third Angle Theorem

If 2 pairs of angles in two triangles are congruent, then the third pair is congruent as well.

SSS Triangle Congruence Postulate

Given 2 triangles, if all 3 sides are congruent, then the triangles are congruent

ASA Triangle Congruence Postulute

Given 2 sets of congruent angles and congruent included sides, the triangles are congruent

SAS Triangle Congruence Postulate

Given 2 sets of congruent sides and a congruent angles which is inbetween them, then the triangles are congruent

AAS Triangle Side Congruence Theorem

Given 2 sets of congruent angles and a not included side, then the triangles are congruent

HL (Hypotenuse Leg) Theorem

Given 2 RIGHT triangles, if 2 sets of legs are congruent, then the triangles are congruent