Which formula shows the correct way of finding the area of a circle?

•  $A=2\pi r$  

•  $A=\ \pi r^2$  

•  $A=\pi r2$  

•  $A=\pi d$  

Areas are measured in terms of ________.

• cubic units

• degrees

• meter

• square units

If the diameter of the circle is 20 cm., what is the radius when squared?

• 10 sq. cm

• 100 sq. cm

• 200 sq. cm

• 400 sq. cm

How will you find the area of a circle?

• Divide the radius by 2 then times 3.14

• Multiply the radius by itself times the value of pi

• Square 3.14 times the radius

• Square the diameter times 3.14

What is the area of a circular pool whose radius is 2 meters?

• $1.256m^2$

• $12.56m^2$

• $125.6m^2$

• $1256m^2$

The diameter of a circle is 10 cm. How will you find the area of a circle?

• Square the diameter times 3.14

• Divide the diameter by 2 times 3.14

• Multiply the diameter by itself times 3.14

• Divide the diameter by 2 then multiply itself and times 3.14

What is the area of a circular table top if its diameter is 20 centimeters?

• $3.14cm^2$

• $31.40cm^2$

• $314cm^2$

• $3140cm^2$

The bottom surface of a circular pond with a radius of of 3.5 m will be tiled. Find the area of the surface that will be tiled.

• $3.846m^2$

• $38.465m^2$

• $384.65m^2$

• $3846.5m^2$