Circumference and Area of Circles.

Presentation

•

Mathematics

•

7th Grade

•

Medium

•

CCSS

7.G.B.4, 3.MD.D.8

Standards-aligned

Alina Sanchez Mederos

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2 Slides • 12 Questions

Circumference and Area of Circles.

By Alina Sanchez Mederos

Multiple Choice

A DVD has a diameter of 15 millimeters. Which equation would help you determine the circumference?

c = π15

C = 2π15

c = 15 ÷ π

c = 15 π²

Multiple Choice

If the radius of a circle is 12.5 meters, the diameter is ____

6.25 meters

125 meters

25 meters

50 meters

Multiple Choice

What is the radius of this circle?

12cm

6cm

24cm

3cm

Multiple Choice

The radius is 8 inches. What is the circumference?

50.24 inches

25.12 inches

12.56 inches

200.96 inches

Multiple Choice

Ms. Catall is using a compass to find her way out of the woods. The compass has a radius of 4 centimeters. What is the compass's area?

49.2 cm²

45.6 cm²

50.24 cm²

55.9 cm²

Multiple Choice

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's area?

31.25 m²

29.55 m²

30.36 m²

28.26 m²

Multiple Choice

Jayne has a very large circular lollipop that has a circumference of 25.12 inches. What would the diameter of Jayne’s lollipop be? Use π = 3.14.

4 in.

8 in.

12 in.

16 in.

Multiple Choice

The circumference is 62.8 inches. What is the radius?

20 inches

10 inches

6.28 inches

31.4 inches

Multiple Choice

A circular pie has an area of 706.5 cm². What is the radius of the pie?

225 cm

30 cm

15 cm

112.5 cm

Multiple Choice

Alex has trained his puppy, Popper, to jump through a ring. According to Alex's measurements and calculations, the ring has a diameter of 3.5 feet. What is the ring's circumference (use 3.14 for pi)?

11.32 ft

12.25 ft

10.99 ft

8.75 ft

Multiple Choice

A circle pool has a radius of 7.5 ft. Monica wants to know how many ft of a pool cover she needs to buy?

23.55 ft²

176.63 ft²

47.1 ft²

706.5 ft²

Multiple Choice

The stained glass window is a semicircle. What is the distance around the window?

40.82 inches

66.82 inches

81.64 inches

107.64 inches

Circumference and Area of Circles.

By Alina Sanchez Mederos

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