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# Geo_2.2

### Vocabulary for Geometry_2.2

TermDefinition
AAS Postulate If two angles and the nonincluded side of one triangle are congruent to the corresponding two angles and side of a second triangle, then the two triangles are congruent.
ASA postulate If two angles and the included side of one triangle are congruent to two angles and the included side of another triangle, then the triangles are congruent.
base angles The angles opposite the congruent sides of an isosceles triangle.
congruent polygon Polygons in which all matching parts are congruent.
congruent Having the same measure.
Converse of Isosceles Triangle Theorem If two angles of a triangle are congruent, then the sides opposite those angles are congruent.
corresponding parts Matching parts of congruent polygons.
CPCTC Corresponding Parts of Congruent Triangles are congruent, or CPCTC.
included angle In a triangle, the angle formed by two sides is the included angle for those two sides.
included side The side of a polygon that is a side of each of two angles.
Isosceles Triangle Theorem If two sides of a triangle are congruent, then the angles opposite those two sides are congruent.
legs of an isosceles triangle The two congruent sides of an isosceles triangle.
SAS Postulate 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.
SSS Postulate If three sides of one triangle are congruent to three sides of a second triangle, then the triangles are congruent.
vertex angle The angle formed by the two congruent sides of an isosceles triangle.
Created by: mtoepper