Circle Angles and Their Measurements

The video tutorial explains how to find the missing angle in a circle divided into three angles. Given angles are 45° and 135°, and the total sum of angles in a circle is 360°. By adding the given angles, we find they sum to 180°. Subtracting this from 360° gives the missing angle, which is also 180°.

What are the given angles in Harold's circle problem?

• 30° and 150°

• 60° and 120°

• 90° and 180°

• 45° and 135°

What is the total sum of angles in a circle?

• 360°

• 450°

• 180°

• 270°

How much of the circle's total angle is used by the known angles?

• 90°

• 180°

• 270°

• 360°

What is the measurement of the missing angle in Harold's circle?

• 225°

• 180°

• 135°

• 90°

If the sum of the known angles is 180°, what operation is needed to find the missing angle?

• Subtraction

• Multiplication

• Addition

• Division