What angle is complement to ?

In a given triangle, the angles are in a ratio of 1:3:5. What size is the middle angle?

AB and CD are two parrellel lines intersected by line EF. If the measure of angle 1 is , what is the measure of angle 2?

Examine the above diagram. What is ?

What is the sum of the interior angles of a triangle?

The above diagram shows a spinner. The radius of the smaller quarter-circles is half that of the larger quarter-circles.

A player spins the above spinner. What is the probability that the spinner will stop while pointing inside a red region?

and are supplementary; and are complementary.

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What is ?

The base angle of an isosceles triangle is thirteen more than three times the vertex angle. What is the difference between the vertex angle and the base angle?

Figure NOT drawn to scale.

If and , evaluate .

In a right triangle ABC, the measure of angle C is greater than 60 degrees. Which of the following statements could describe the measures of angles A and B?