Complementary and Supplementary Angles

The video tutorial covers the identification and classification of four types of angles: acute, obtuse, right, and straight. It explains complementary angles, which add up to 90 degrees, and supplementary angles, which add up to 180 degrees. The tutorial includes practice problems to find missing angles in complementary and supplementary pairs, emphasizing the calculation methods and logical reasoning behind these concepts.

What is the main focus of the video tutorial?

• Understanding geometric shapes

• Solving algebraic equations

• Identifying and classifying angles

• Learning about parallel lines

Which of the following is true about acute angles?

• They are greater than 180 degrees

• They are less than 90 degrees

• They are exactly 180 degrees

• They are exactly 90 degrees

What is the range of an obtuse angle?

• Less than 90 degrees

• Exactly 90 degrees

• Greater than 90 degrees but less than 180 degrees

• Exactly 180 degrees

What is a right angle?

• An angle exactly 180 degrees

• An angle exactly 90 degrees

• An angle greater than 90 degrees

• An angle less than 90 degrees

What does a straight angle look like?

• A circle

• A curve

• A line

• A triangle

What do complementary angles add up to?

• 45 degrees

• 360 degrees

• 180 degrees

• 90 degrees

What do supplementary angles add up to?

• 45 degrees

• 90 degrees

• 360 degrees

• 180 degrees

If two angles are complementary and one is 48 degrees, what is the other angle?

• 38 degrees

• 52 degrees

• 42 degrees

• 32 degrees

If two angles form a line and one is 45 degrees, what is the other angle?

• 135 degrees

• 90 degrees

• 45 degrees

• 180 degrees

What is the complement of a 38-degree angle?

• 142 degrees

• 90 degrees

• 38 degrees

• 52 degrees