Angles and Triangles

Two angles that add to 180° can be described as...

• complementary angles

• supplementary angles

• right angles

• straight angles

Describe the relationship between a and b.

• complementary angles

• supplementary angles

• vertical angles

• right angles

Describe the relationship between a and b.

• complementary angles

• supplementary angles

• vertical angles

• right angles

Describe the relationship between a and b.

• complementary angles

• supplementary angles

• vertical angles

• right angles

Cardi thinks both of the angles have the same measure, but Nicki thinks the two angles have different measures.

Who is right?

• Cardi

• Nicki

• Both are right

• Neither are right

What is the value of x?

• 22°

• 112°

• 32°

• 122°

What is the value of x?

• 60

• 120

• 81

• 21

What is the value of x?

• 45

• 135

• 180

• 55

What is the value of x?

• 50

• 90

• 80

• 60

Which equation best represents the diagram?

• x + 110 = 180

• x + 90 + 20 = 90

• 20 + x = 90

• 180 = x + 90 - 20