Understanding Angles: Complementary and Supplementary

The video tutorial explains the use of an L Square to measure right angles, which are 90 degrees. It discusses how complementary angles add up to 90 degrees and supplementary angles add up to 180 degrees. The tutorial provides three memory aids to help differentiate between complementary and supplementary angles, using the alphabet and number line as references. It also offers visual aids to reinforce the understanding of these angle types.

What tool is used to measure right angles?

• Protractor

• Ruler

• L Square

• Compass

What is the sum of complementary angles?

• 360 degrees

• 45 degrees

• 90 degrees

• 180 degrees

Which of the following is an example of complementary angles?

• Two angles forming a triangle

• Two angles forming a circle

• Two angles adding up to 90 degrees

• Two angles adding up to 180 degrees

What is the sum of supplementary angles?

• 90 degrees

• 360 degrees

• 180 degrees

• 270 degrees

Which of the following is an example of supplementary angles?

• Two angles adding up to 90 degrees

• Two angles adding up to 180 degrees

• Two angles forming a hexagon

• Two angles forming a square

How can you remember that complementary angles add up to 90 degrees?

• S is for square

• C is for circle

• S comes before C in the alphabet

• C comes before S in the alphabet

Which letter is associated with complementary angles in the mnemonic device?

• R

• S

• C

• P

What does the letter 'P' in 'complementary' resemble when turned around?

• A nine

• An eight

• A six

• A zero

How many 'P's are in the word 'supplementary'?

• Four

• Three

• Two

• One