Solving Missing Angles with Angle Relationships

What type of relationship involves angles that are directly across from each other and equal?

• Alternate Interior

• Supplementary

• Vertical

• Corresponding

If two angles are alternate exterior angles, how are they related?

• Complementary

• Congruent

• Supplementary

• None of the above

In the equation 12x - 2 = 10x + 10, what is the value of x?

• 6

• 5

• 8

• 7

After solving the equation for x, what is the next step to find the angle measure?

• Subtract from 180

• Multiply by 2

• Plug x back into the angle expression

• None of the above

What is the sum of supplementary angles?

• 360

• 270

• 180

• 90

If one angle is 60 degrees and the other is x + 130, what is the value of x when they are supplementary?

• -5

• 90

• 10

• -10

What type of angles are always less than 90 degrees?

• Obtuse

• Right

• Acute

• Straight

In the puzzle activity, what is the first step to solve for angle m?

• None of the above

• Add to adjacent angle

• Find it on the side and cross it off

• Subtract from 180

What is the measure of angle m in the puzzle?

• 180

• 135

• 90

• 45

How do you solve for the remaining angles in the puzzle after finding angle m?

• Add 135 to each

• None of the above

• Multiply by 2

• Subtract 135 from 180