Area of Circles, Half Circles, Quarter Circles

Find the area.

• 34.54 cm²

• 379.94 cm²

• 189.97 cm²

• 44.54 cm²

Tags

CCSS.7.G.B.4

Find the area.

• 25.12 m²

• 50.24 m²

• 12.56 m²

• 20.56 m²

Tags

CCSS.7.G.B.4

is half of a circle.

• circumference

• pi

• semicircle

• composite figure

If you are given the diameter, how can you calculate the radius?

• Multiply the diameter by 2

• Subtract 2 from the diameter

• Add 2 to the diameter

• Divide the diameter by 2

Tags

CCSS.7.G.B.4

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

• Radius

• Diameter

What does area mean?

• the distance around a shape

• half the distance around a shape

• the amount of space outside a shape

• the amount of space inside a shape

Mason needs to purchase new glass for the window pictured here.  About how many square feet of glass will he need to purchase? 

• 20 ft²

• 13 ft²

• 26 ft²

• 41 ft²

A local restaurant places tissue-paper liners in baskets for yeast rolls like the liner pictured.
About how many square centimeters of tissue paper are needed to make one liner?

• 200.96 cm²

• 379.2 cm²

• 251.2 cm²

• 253.6 cm²

The model of the backboard of a basketball goal shown on your recording sheet is composed of a rectangle and a semicircle.  Use a ruler to measure the dimensions of the model to the nearest half inch.
Which measurement is closest to the area of the model of the backboard in square inches?

• 18.56 in.²

• 31.12 in.²

• 12.28 in.²

• 23.56 in.²

Which of the following is closest to the area of the figure shown?

• 420 cm²

• 521 cm²

• 320 cm²

• 1,124 cm²