AnswersOC27 GEO-1206310-S1-Degele-VOL7006PParallel and Perpendicular Lines

Area of Triangles and Parallelograms Answers

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The vertex angle of an isosceles triangle measures 40°. What is the measure of a base angle?

A
40°
B
70°
C
100°
D
140°
2
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Consider the diagram and proof by contradiction.Given: △ABC with AB ≅ AC

Question illustration
A
AB ≠ AC
B
∠B ≅ ∠C
C
ABC is not a triangle
D
∠A ≅ ∠B ≅ ∠C
3

Triangle SQT is isosceles. The measure of angle STQ is 48°.

Question illustration
A
24°
B
38°
C
48°
D
76°
4

Triangle ABC is an isosceles right triangle. What is the measure of one base angle?

A
30º
B
45º
C
60º
D
90º
5

What is always true about the angles of an isosceles triangle?

A
All three angles are congruent.
B
At least two of the angles are congruent.
C
The vertex angle is a right angle.
D
The vertex angle is obtuse.
6

Right triangle ABC is isosceles and point M is the midpoint of the hypotenuse.

Question illustration
A
It is congruent to triangle ABC.
B
It is an obtuse triangle.
C
It is an isosceles right triangle.
D
It is a scalene triangle.
7

Isosceles triangle ABC has a perimeter of 96 centimeters. The base of the triangle is and measures 24 centimeters.What is the measure of ?

Question illustration
A
12 cm
B
36 cm
C
48 cm
D
72 cm
8

Triangle ABC is isosceles.

Question illustration
A
It is twice the measure of angle A.
B
It is twice the measure of angle C.
C
It is equal to the measure of angle A.
D
It is equal to the measure of angle C.
9

In triangle FGH, is an angle bisector of and perpendicular to .

Question illustration
A
4
B
8
C
16
D
24
10

Consider the diagram and proof by contradiction.Given: △ABC with ∠B ≅ ∠CProve: AB ≅ AC

Question illustration
A
converse of the isosceles triangle theorem
B
substitution
C
definition of congruency
D
converse of the triangle parts relationship theorem

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