AnswersFL-1205070-MJ Grade 8 Pre-Algebra Summer 2026Solving for Unknown Angles in Triangles

Finding Unknown Angle Measures Answers

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Which did you include in your explanation? Check all that apply.

A
Sum of the measures of the interior angles of a triangle is 180°.
B
2x + 90 = 180°
C
x = 45°
3

z = 134135✔ 136180°

A
134
B
135
C
✔ 136
D
180
4

Angle y = °

Answer:

50

5

mUXD = 4149131✔ 139°

Question illustration
A
41
B
49
C
131
D
✔ 139
6

What is the measure of angle QNP?

Answers:
°:90
°:134
°:136
7

mXDQ = ✔ 4149131139°

Question illustration
A
✔ 41
B
49
C
131
D
139
8

A triangle has a 90° angle, and the other two interior angles are congruent. Explain how to find the measure of one of the two congruent angles.

Answer:

Does some of the the interior angles of the triangles 180 degrees so 2x + 90 equals 180° so X = 45°

9

What is the measure of CAB?

Question illustration
A
38°
B
52°
C
70°
D
128°
10

Which statements describe the relationship of the angles in the triangle? Check all that apply.

A
The sum of the three angles is 90°.
B
The sum of the angles in the triangle is 180°.
C
The three angles are adjacent and form a straight angle.
D
The third angle is 45°.
E
There is a pair of congruent angles.
11

What is the measure of angle QNP?

Answers:
m∠PQR = °:40
m∠QNP = °:60
12

x = 4868✔ 90100°

Answers:
°:90
°:134
°:136
13

y = ✔ 134135136180°

A
✔ 134
B
135
C
136
D
180
14

40✔ 6080100

A
40
B
✔ 60
C
80
D
100

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