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Honors Geometry Chapter 4 Quiz
Vocabulary, Postulates, Theorems, and Abbreviations
15
Mathematics
8th Grade
11/02/2010

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Term
Congruent
Definition
Same size, same shape
Term
CPCTC
Definition
Corresponding parts of congruent triangles are congruent
Term
SSS Postulate
Definition
If three sides of one triangle are congruent to three sides of another triangle, then the triangles are congruent
Term
SAS Postulate
Definition
If two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, then the triangles are congruent
Term
ASA Postulate
Definition
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
Term
Isosceles triangle
Definition
A triangle with at least 2 congruent sides
Term
Legs of an isosceles triangle
Definition
The 2 congruent sides
Term
Base of an isosceles triangle
Definition
The 3rd side
Term
Vertex of an isosceles triangle
Definition
The angle formed by the legs
Term
Base angles of an isosceles triangle
Definition
angles formed by 1 leg and 1 base
Term
Isosceles Triangle Theorem
Definition
if two angles of a triangle are congruent, then the angles opposite those sides are congruent
Term
Abbreviation of the Isosceles Triangle Theorem
Definition
Isosceles Triangle -> Base angles congruent
Term
Equilateral and equiangular triangle (Corollary)
Definition
An equilateral triangle is also equiangular
Term
Equilateral triangle & 60 (Corollary)
Definition
An equilateral triangle has three 60 angles
Term
Bisector of the vertex angle of an isosceles triangle (Corollary)
Definition
The bisector of the vertex angle of an isosceles triangle is perpendicular to the base at its midpoint
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