Exploring Complementary Angles and Their Relationships

The video tutorial by Mr. J explains complementary angles, which are two angles that add up to 90 degrees. It provides examples of how to find a missing angle when one angle is given. The first example involves a given angle of 25 degrees, and the second example involves a given angle of 72 degrees. The video demonstrates both mental math and subtraction methods to find the missing angle and verifies the results by adding the angles to ensure they sum to 90 degrees. The tutorial concludes with a recap of the key concepts.

What is the sum of complementary angles?

• 180 degrees

• 360 degrees

• 45 degrees

• 90 degrees

What is the first step in solving for a missing complementary angle?

• Identify the given angle

• Multiply the angles

• Subtract the angles

• Add the angles

If the sum of two angles is 90 degrees, how are they classified?

• Vertical

• Supplementary

• Complementary

• Adjacent

If one angle is 25 degrees, what is the measure of its complementary angle?

• 75 degrees

• 90 degrees

• 65 degrees

• 55 degrees

To find a missing complementary angle, you should subtract the known angle from...

• 90 degrees

• 100 degrees

• 180 degrees

• 45 degrees

What mathematical operation is primarily used to find a missing complementary angle?

• Division

• Multiplication

• Subtraction

• Addition

How do you verify if two angles are complementary?

• Subtract them

• Divide them

• Add them and check if the sum is 90 degrees

• Multiply them

After finding a missing angle, what should you do to ensure accuracy?

• Multiply it by 2

• Add it to the given angle and check if the sum is 90

• Divide it by 2

• Subtract it from 180

What is the missing angle if one of the complementary angles is 72 degrees?

• 15 degrees

• 28 degrees

• 18 degrees

• 20 degrees

What is the complementary angle of 18 degrees?

• 72 degrees

• 108 degrees

• 90 degrees

• 45 degrees