Circles - Week 1 Practice - 22/7 and in Terms of Pi

What are the 3 ways you can use pi to find the circumference

• Pi

• 3.14

• 22/7

• 3.1425

What is the formula for circumference?

• C = 2 x pi x r

• C = 3.14 x radius squared

• C = 22/7 x diameter

• C = pi squared

What is the formula for finding the area of a circle?

• A = pi x radius squared

• C = pi x diameter

• A = 3.14 x diameter

• A = 22/7 x radius

When asked to put your answer in terms of PI, do you?

• Keep Pi in your answer after you do square the radius

• You just square the radii

• You squared the diameter

• You multiply pi squared

What is the diameter?

• 8
• 16
• 10
• 4

Is the red line a radius or diameter of the circle?

• Radius
• Diameter

What does π equal?

• 3

• 3.14

• 3.2

• 22/7

• 616/7 in

• 308/7 in

• 616 square in

• None of the above

• 22/7 in²

• 440/7 in²

• 2200/7 in²

• 220/7 in²