Area of Circles and Composite Area

Area of a Circle

Multiple Choice

Which circle shows the diameter

Multiple Choice

What is $$\pi$$  equal to?

• $$72$$  

• $$3.14$$  

• $$314$$  

• $$31.4$$  

Multiple Select

What is the formula for the area of a circle? (More than one answer)

• $$C=2\pi r$$  

• $$C=\pi d$$  

• $$C=\pi$$  

• $$C=\pi\cdot3.14$$  

Multiple Choice

Find the circumference of the circle

• $$28.56\ ft$$

• $$37.68\ ft$$

• $$15.23\ ft$$

• $$24.54\ ft$$

Multiple Choice

Find the area of a circle with a radius of 3.2 centimeters.

• $$30.5\ cm^2$$

• $$32.2\ cm^2$$

• $$28.3\ cm^2$$

• $$25.2\ cm^2$$

Multiple Choice

The bottom of a circular swimming pool with a diameter of 30 ft is painted blue. How many square feet are blue?

• $$305.3\ ft^2$$

• $$322.9\ ft^2$$

• $$706.5\ ft^2$$

• $$252\ ft^2$$

Multiple Choice

Find the approximate area of a semi circle with a radius of 6 centimeters

• $$23.4\ cm^2$$

• $$56.5\ cm^2$$

• $$123.5\ cm^2$$

• $$544.3\ cm^2$$