7th Math Circumference

A circular swimming pool has a radius of 28 ft. There is a path all the way around the pool that is 4 ft wide. A fence is going to be built around the outside edge of the pool path. A circle has a radius of 28 feet. A larger circle goes around the smaller circle that is 4 feet wide. About how many feet of fencing are needed to go around the pool path? Use 3.14 for Pi.

201 ft

What is the diameter of this circle if the circumference is 30 pi inches? A circle. C = 30 pi in.

30 in.

What is the circumference of the circle? Use 3.14 for Pi. A circle with radius 6.4 centimeters.

40.192 cm

John is putting a fence around his garden that is shaped like a half circle and a rectangle. A rectangle has a length of 14 feet and width of 7 feet. A semicircle with diameter of 7 feet is on top of the rectangle. How much fencing will John need? Use 22/7 for Pi.

46 ft

A tire rim has a diameter of 15 in. What is the circumference of the tire rim? Use 3.14 for pi .

47.1 in.

What is the circumference of this circle, in centimeters? Use 22/7 for Pi. A circle with diameter 21 centimeters.

66

A high school track is shaped as a rectangle with a half circle on either side. A rectangle has a length of 85 yards and width of 25 yards. 2 semicircles with diameters of 25 yards are on each end of the rectangle. Jasmine plans on running three laps. How many yards will Jasmine run? Use 3.14 for Pi.

745.5 yd

Which formula should be used to find the circumference of a circle?

C = pi d

Which statement is true about the circumference of a circle?

The circumference is found by multiplying Pi by the diameter.

Which statements are true about the circle shown below? Select three options. A circle with diameter 8 centimeters. The diameter is 8 cm and the radius is 16 cm. The circumference of the circle in terms of Pi is 8 pi. If Pi is approximated to StartFraction 22 over 7 EndFraction, the circumference of the circle is approximately 25.14 cm. The circumference of the circle rounded to the nearest whole number is 20 cm. If Pi is approximated to 3.14, the circumference of the circle is 25.12 cm.

The circumference of the circle in terms of Pi is 8 pi. If Pi is approximated to StartFraction 22 over 7 EndFraction, the circumference of the circle is approximately 25.14 cm. If Pi is approximated to 3.14, the circumference of the circle is 25.12 cm.

The circumference of a circle is 36 pi feet. What is the length of the radius of this circle?

18 ft

A high school track is shaped as a rectangle with a half circle on either side. A rectangle has a length of 96 meters and width of 35 meters. 2 semicircles with diameters of 35 meters are on each end of the rectangle. Jake plans on running four laps. How many meters will Jake run? Use 3.14 for Pi.

1,207.6 m

The circumference of a circle is 28 pi inches. What is the length of the radius of this circle?

14 in.