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Proportional Circles

Authored by Anthony Clark

Mathematics

7th Grade

CCSS covered

Proportional Circles
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10 questions

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1.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

An artist is making a circular stained glass window with a diameter of 10 in. The stained glass costs $4.50 per square inch. To the nearest dollar, what will be the total cost of the stained glass for the artist's entire window?

$31

$79

$353

$1413

Tags

CCSS.7.G.B.4

2.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The Jones family wants to enclose their circular garden with a fence. To the nearest foot, what is the minimum length of fencing they need to buy?

56.25 ft

246 ft

365 ft

393 ft

Tags

CCSS.7.G.B.4

3.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

A bicycle tire has a diameter of 27 inches. How far does the bike travel along the ground when the wheel rotates once?

84.78

15.5

27

13

Tags

CCSS.7.G.B.4

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

Shring's dining room table is round and has a radius of 4.5 feet. What is the tabletop's area?

63.585 ft2

68.345 ft2

64.585 ft2

61.345 ft2

Tags

CCSS.7.G.B.4

5.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

What is the constant of proportionality of the circumference to the radius?

2π, or 6.28

It depends on the measurements.

They are not proportional.

π, or 3.14

Answer explanation

Since we have to double the radius to get the diameter, the constant of proportionality between circumference and the radius is 2π.

Tags

CCSS.7.RP.A.2B

6.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The ratio of the radii of two circles is 4:9. What is the ratio of their circumferences?

2:3

4:9

16:81

Tags

CCSS.7.G.B.4

7.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

The ratio of the circumference of a circle to the diameter

distance

pi

radii

diameter

Tags

CCSS.7.G.B.4

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