Unit 2: Angles and Equations

The angles in a triangle have measures of 90°, 65°, and (x – 10)°. What is the value of x?

• A 15

• B 25

• C 35

• D 45

Tags

CCSS.8.G.A.5

Two angles are supplementary. One angle has a measure of x° and the other angle has a measure of 30°. Which equation could be used to determine the value of x?

• A x + 30 = 180

• B x + 30 = 90

• C x = 30 – 90

• D x = 30 – 180

Tags

CCSS.7.G.B.5

The three angles in a triangle have measures of 35°, 120°, and x°. Which equation below could be used to determine the value of x?

• A 35 + 120 + x = 360

• B 35 + 120 + x = 180

• C 35 + 120 = x

• D 35 + 120 + x = 90

Tags

CCSS.8.G.A.5

Two complementary angles have measures of 15° and (x+5)°. What is the value of x?

• A 70

• B 75

• C 80

• D 160

Tags

CCSS.7.G.B.5

The three angles in a triangle have measures of 55°, 75°, and (2x)°. What is the value of x?

• A 130

• B 100

• C 50

• D 25

Tags

CCSS.8.G.A.5

Two supplementary angles have measures of (2x)° and (x – 30)°. Which equation could be used to determine the value of x?

• (2x) + (x – 30) = 90

• (2x) = (x – 30)

• (2x) + (x – 30) = 360

• (2x) + (x – 30) = 180

Tags

CCSS.7.G.B.5

The three angles in a triangle have measures of (x)°, (2x)°, and (3x)°. What is the measure of the greatest angle?

• 30°

• 60°

• 90°

• 180°

Tags

CCSS.8.G.A.5

Two supplementary angles have measurements of (3x)° and (10x – 15)°. What are the measures of the two angles?

• 45° and 135°

• 25° and 65°

• 15° and 165°

• 30° and 60°

Tags

CCSS.7.G.B.5

The three angles in a triangle have measures of (3x+2)°, 40°, and 120°. What is the value of x?

• 1

• 6

• 20

• 160

Tags

CCSS.8.G.A.5

Two complementary angles have measures of (x+7)° and (3x)°. Which equation could be used to determine the value of x?

• (x+7) + (3x) = 180

• (x+7) + (3x) = 90

• (x+7) = (3x)

• (3x) – 90 = (x+7)

Tags

CCSS.7.G.B.5