Area of Circles Quiz

How to find the Area of the Circle?

• Radius x Radius x π

• Radius x Radius x 2

• Diameter x Diameter x π

• Radius x Radius x 31.4

Sarah wanted to buy Micheal a watch. The watch's radius was 5cm, what is its area? (Take π as 3.14)

• 78.5 m

• Not calculatable

• 78.6 cm

• 0.785 m

If a circle's radius is π, what is its area in cm2? (Take π as 3.141592...∞)

• About 31.0062766803 cm2

• 19.7192 cm2

• Not Calculatable

• About 34.8864264 cm2

John buys a pizza, he calculates the area of the pizza. He gets 50.24 m. Find the Radius of the Pizza (Take π as 3.14)

• 8 m

• 8 cm

• 4 m

• Cannot be calculated

Radius x Radius x π = Diameter x Diameter x π / 2?

• False

• True

Mike wants to buy a clock with an area of less than 79 cm2. What should be the diameter of the clock? (Take π as 3.14)

• 10 cm

• 3.9 m

• 12 cm

• 8 cm

Is the Formula Correct? Radius x Radius x π = Area of Circle

• True

• False

If a circular lunchbox's radius is 49cm, then what is the area of the circular lunchbox's (Take π as 22/7)

• 154 cm

• Not calculable

• 175 cm

• 153 cm

Jack buys 5 buttons. The radius of a button is 3 cm. If 1cm2 costs $5 then how much does he pay? (Take π as 3.14)

• 28.26

• None of the above

• 23.56

• 64.3

If a circle's radius is π, what is its area in cm2? (Take π as 3.141592...∞)

• About 34.8864264 cm2

• 19.7192 cm2

• None of the above

• Not Calculatable