Answers2026 Summer 305 Edgenuity CR_Grade 8 Pre-Algebra_MathSum of Interior Angles of a Triangle

Sum of Interior Angles of a Triangle Answers

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Which kind of angle pair is angle A and the angle marked 70°?✔ alternate interior angles alternate exterior anglesvertical anglescorresponding angles

Answers:
Selection 1:alternate interior angles
°:70
°:80
°:30
2
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What is the measurement of each angle?m∠A = °

A
10
B
30
C
70
D
80
3

m∠B = °

A
10
B
30
C
70
D
80
4

m∠C = 10✔ 307080°

A
10
B
✔ 30
C
70
D
80
5

Question text not available

Answers:
°:70
°:80
°:30
6

The diagram shows parallel lines cut by two transversal lines creating a triangle. Which statement can be made from the diagram?

A
mB + mC + 55° = 180°
B
mA + 60° + 55° = 180°
C
mC = 55°
D
mA = 55°
7

Shalini found the sum of the measures of the interior angles of the triangle to be 175°. She knows the sum is supposed to be 180°. What was Shalini’s error?

A
m∠A = 45°
B
m∠B = 85°
C
m∠C = 45°
D
Shalini did not add the sum of the 3 angles correctly.
8

What is the sum of the measures of 1 and 2?m1 + m2 = °

Question illustration
Answer:

131

9

Which equation would help find the measure of ∠M?

A
x + 52 + 78 = 180
B
52 + x = 180 + 78
C
180 + 52 = 78 + x
D
180 + x = 78 + 52
10

What is the measure of M?°

Question illustration
Answer:

50

11

Which cannot be the angle measurements of triangle ABC?

A
Option
B
Option
C
Option
D
Option
12

Which statement is true about angle C?

A
The angle is acute.
B
The angle does not make a straight line with the other two.
C
The angle is obtuse.
D
The angle is a right angle.
13

The diagram shows parallel lines cut by two transversal lines creating a triangle. Which statements are true? Check all that apply.

A
m∠A = 20°
B
∠B and the angle marked 60° are alternate exterior angles.
C
m∠C = 100° because it is a vertical angle to the angle marked 100°.
D
∠B and ∠C are supplementary angles.
E
m∠A + m∠B + m∠C = 180°
14

Check all that you included in your response.

A
Interior angles add up to 180°, so mB = 65°.
B
Straight lines add up to to 180°, so m2 = 65°.
C
2 and B are congruent.

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