Quiz about Circumference & Area of Circles (Intro)

Question 1

Which is NOT a circumference formula?

Accepted Answer

$$\pi imes r imes r$$

Answer

$$2 imes\pi imes r$$

Answer

$$\pi imes d$$

Question 2

Which is NOT a formula to calculate area of a circle?

Accepted Answer

Answer

$$\pi r^2$$

Answer

$$\pi imes r imes r$$

Question 3

The circumference of a circle with a radius of 12cm is

Accepted Answer

$$2 imes\pi imes12$$

Answer

$$\pi imes12 imes12$$

Answer

$$\pi imes12$$

Answer

$$12\div\pi$$

Question 4

The area of a circle with a radius of 12cm is

Accepted Answer

$$\pi imes12 imes12$$

Answer

$$2 imes\pi imes12$$

Answer

$$\pi imes12$$

Answer

$$12\div\pi$$

Question 5

The circumference of a circle with a radius of 8cm is

Accepted Answer

$$2 imes\pi imes8$$

Answer

$$\pi imes24$$

Answer

$$\pi imes8$$

Answer

$$\pi imes8 imes8$$

Question 6

The area of a circle with a radius of 8cm is

Accepted Answer

$$\pi imes8 imes8$$

Answer

$$\pi imes16$$

Answer

$$\pi imes8$$

Answer

$$2 imes\pi imes8$$

Question 7

The area of a circle with a radius of 20m is

Accepted Answer

$$\pi imes20 imes20$$

Answer

$$\pi imes40$$

Answer

$$2 imes\pi imes20$$

Answer

$$40\div\pi$$

Question 8

The circumference of a circle with a radius of 20m is

Accepted Answer

$$\pi imes40$$

Answer

$$\pi imes20 imes20$$

Answer

$$2 imes\pi\div20$$

Answer

$$40\div\pi$$

Question 9

The area of a circle with a radius of 45m is

Accepted Answer

$$\pi imes45 imes45$$

Answer

$$\pi imes45$$

Answer

$$2 imes\pi imes45$$

Answer

$$\pi imes45+45$$

Question 10

The circumference of a circle with a radius of 45m is

Accepted Answer

$$2 imes\pi imes45$$

Answer

$$\pi imes45$$

Answer

$$\pi imes45 imes45$$

Answer

$$\pi imes45+45$$

Circumference & Area of Circles (Intro)

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