Term

Definition
Right ∆ABC has two congruent legs. Therefore we also refer to it as a(n) ______________________________. 


Term
legs OR legs of an isosceles triangle 

Definition
The congruent sides of an isosceles triangle are referred to as ______________________________. 


Term

Definition
In triangle ABC, segments AB and AC are congruent. We refer to angle BAC as the ______________________________. 


Term

Definition
In isosceles triangle ABC, segments AB and AC are congruent. We refer to segment BC as the isosceles triangle’s ______________________________. 


Term

Definition
We call the angle formed by the congruent sides of an isosceles triangle the “vertex angle.” The other two angles are called ______________________________ 


Term

Definition
Each of the two sides that make up the right angle in a right triangle is referred to as a(n) ______________________________. 


Term

Definition
Two figures are ______________________________ if and only if they are the same size and shape. 


Term

Definition
We use the word “______________________________” to refer to a theorem that can easily be derived from another theorem. 


Term
alternate interior angles 

Definition
If two nonadjacent angles on the interior of two lines cut by a transversal are on opposite sides of that transversal, then we refer to them as ______________________________ angles. 


Term
sameside interior angles 

Definition
Angles 1 and 2 are between lines l and m, and they are on the same side of line p. We refer to them as __________.
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