Understanding Supplementary Angles

In this video from Bru's Math Club, the concept of supplementary angles is introduced. Supplementary angles are two angles whose measures add up to 180 degrees. The video provides an example with angles measuring 80° and 100°, demonstrating how they form a straight angle or line when combined. The tutorial also revisits the idea of a straight angle from previous lessons, reinforcing the connection between different types of angles. The video concludes with a recap of the key points about supplementary angles.

What is the sum of two complementary angles?

• 180°

• 45°

• 90°

• 360°

Which of the following pairs of angles are supplementary?

• 45° and 45°

• 90° and 90°

• 80° and 100°

• 60° and 60°

If one angle is 70°, what should be the measure of the other angle to make them supplementary?

• 110°

• 100°

• 90°

• 120°

What is the measure of a straight angle?

• 180°

• 90°

• 45°

• 360°

Which of the following statements is true about supplementary angles?

• They form a straight line

• They add up to 90°

• They form a right angle

• They are always equal

If two angles are supplementary and one is 130°, what is the other angle?

• 70°

• 80°

• 60°

• 50°

What is another name for a 180° angle?

• Obtuse angle

• Straight angle

• Right angle

• Acute angle