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Radius/Diameter
Circumference Radius/Diameter
Area - Radius
Word Problems Circumference Area
Area - Diameter
100
If the radius is 5 what is the diameter?
10
100

Find circumference: When radius = 5 inches

31.42 inches

100

Find Area when Radius = 4 mi

50.27 sq mi

100

Brad is putting up a 10 foot diameter circular flower garden in his yard. He will put plastic edging along the flowerbed. How many feet of edging will Brad need to enclose his flower garden? Round to the nearest whole number.

31 ft

100

What is the area of a circle with a diamater of 6 in?

28.27 sq in

200
A straight line passing from side to side through the center of a circle
Diameter
200

Find Circumference when Radius is 10 yd

62.83 yd

200

Find Area when Radius = 14 mm

615.75  sq mm

200

Brad is putting up a 10 foot diameter circular flower garden in his yard. How many square feet is his garden?  Round to the nearest whole number.

A = 79 square feet

200

What is the area of a circle with a diameter of 10 yd?

78.54 sq yd

300
If the radius is 30 the diameter is?
60
300

Find the radius when the circumference is 360 inches.

57.3 inches

300

Find Area when Radius = 21 yd

1,385.44 sq yd

300

Gene’s frying pan Is 14.5 inches in diameter. What is the circumference of his frying pan? (round to the nearest tenth place)

45.6 inches

300

What is the area of a circle with a diameter of 20 mi?

314.16 sq mi

400
If the diameter is 20 what is the radius?
10
400

Find Circumference when Radius = 50 cm

314.2 cm

400

Find Area when Radius = 35 ft

3,848.45 sq ft

400

Macy measures a truck’s tire mark for one complete revolution as 120.48 inches long. What is the diameter of the tire? (round to the nearest tenth place)

d = 38.3 inches

400

What is the area of a circle with a diameter of 22 cm?

380.13 sq cm

500
What is the definition of radius?
A line segment that starts from the center of the circle to any point on the circle. It is half the diameter.
500

Abby has a circular walking path by her house. She looked on a map and saw the radius of the path was about 150 feet. If she walks around the path 4 times, about how far will she walk?

3768 feet

500

Find Area when Radius = 50 in

7,853.98 sq in

500

Kelsey bought a circular rug that is 12 feet in diameter. The rug has a blue border and a red circular center that is 4 feet in diameter. What is the area of the blue border? (Round to the nearest whole number.)

A = 50 sq ft

500

What is the area of a circle with a diameter of 100 ft?

7,853.98 sq ft