My Triangle Sum Theorem with Equations

Which equation can be used to solve for y?

• 4y + y - 10 = 180

• 4y + y - 10 + 20 = 180

• 4y = y - 10

What is the value of 'y' in the first triangle shown?

• 30

• 34

• 36

• 40

What is the measure of the top angle in the first triangle?

• 120°

• 130°

• 136°

• 140°

What is the value of 'x' in the second triangle shown?

• 30.5

• 35

• 37.5

• 40

What is the measure of the left angle in the second triangle?

• 65°

• 70°

• 75°

• 80°