Chapter 3

Question 0

base of an isosceles triangle

Answer 0

The third side is the base. The two congruent legs form the vertex angle. The other two angles are the base angles.

Question 1

base angles of an isosceles triangle

Answer 1

The congruent sides of an isosceles triangle are its legs. The third side is the base. The two congruent legs from the vertex angles. The other two angles are the base angles.

Question 2

congruence transformation

Answer 2

Because compositions of rigid motions take figures to congruent figures, they are also called congruence transformations

Question 3

congruent polygons

Answer 3

Have congruent corresponding parts–their matching sides and angles. When you name congruent polygons, you must list corresponding vertices in the same order.

Question 4

Corollary

Answer 4

Is theorem that can be proved easily using another theorem. Since a corollary is a theorem, you can use it as a reason in a proof.

Question 5

hypotenuse

Answer 5

In a right triangle, the side opposite the right angle is called the hypotenuse. It is the longest side in the triangle. The other two sides are called legs.

Question 6

legs of an isosceles triangle

Answer 6

The congruent sides of an isosceles triangle are its legs.

Question 7

legs of a right triangle

Answer 7

The two sides besides the hypotenuse are the legs if a right triangle.

Question 8

vertex angle of an isosceles triangle

Answer 8

The two congruent legs form the vertex angle.