Exploring Complementary and Supplementary Angles

The video tutorial by Earthben covers complementary and supplementary angles. It begins with a recap of angle types, including right, acute, obtuse, straight, and reflex angles. Complementary angles are defined as two angles that add up to 90 degrees, with examples provided. The term 'complementary' is explained as originating from the Latin word 'completum'. Supplementary angles are defined as two angles that sum to 180 degrees, with examples given. The video concludes by emphasizing the simplicity of these concepts and encourages further learning through other tutorials.

What is an angle formed by?

• Two rays sharing a common endpoint

• A line and a ray intersecting

• Two lines intersecting at any point

• Two parallel lines

What type of angle measures exactly 90 degrees?

• Right angle

• Acute angle

• Obtuse angle

• Straight angle

Which of the following is not a type of angle discussed in the video?

• Right angle

• Acute angle

• Oblique angle

• Reflex angle

Which angles sum up to 90 degrees?

• Supplementary angles

• Right angles

• Complementary angles

• Reflex angles

In a right triangle, if one angle is 70 degrees, what is the measure of the other angle to make them complementary?

• 20 degrees

• 110 degrees

• 30 degrees

• 120 degrees

What is the origin of the term 'complementary'?

• Greek word for 'complete'

• Spanish word for 'completion'

• Latin word for 'completed'

• French word for 'complement'

What should be remembered about the spelling of 'complementary'?

• It is spelled with an 'a'

• It is spelled with an 'o'

• It is spelled with an 'i'

• It is spelled with an 'e'

What is the sum of supplementary angles?

• 90 degrees

• 180 degrees

• 270 degrees

• 360 degrees

If one angle measures 120 degrees, what must the other angle measure to be supplementary?

• 60 degrees

• 70 degrees

• 50 degrees

• 30 degrees

Which statement is true about supplementary angles?

• They are always less than 90 degrees each.

• They must be adjacent angles.

• They can be non-adjacent as long as their sum is 180 degrees.

• They always form a right angle.