Circles Classwork

Find the circumference with a diameter of 18.4 km. Use 3.14 for pi.

• 23.7 km

• 57.8 km

• 19.3 km

• 59.1 km

Find the circumference with a radius of 5.8 cm. Use 3.14 for pi.

• 37 cm

• 38.3 cm

• 36.4 cm

• 42.7 cm

Find the radius of circle with a circumference of 12.6 mi. Use 3.14 for pi.

• 5 mi

• 4 mi

• 8 mi

• 2 mi

find the area of the circle below.

• 100 cm
• 225 cm
• 9 cm
• 28.26 cm

what is the area of a circle with the diameter of 10cm ?

• 66cm
• 78.5cm
• 66.5cm
• 10m

Find the area of sector.

•  $14\pi\ cm^2$  

•  $147\pi\ cm^2$  

•  $147\ cm^2$  

•  $73.5\pi\ cm^2$  

What is the area of the shaded region? Round to the nearest hundredth.

• 1.26

• 452.39

• 9.42

• 113.10

What is the area of the shaded region? Round to the nearest hundredth.

• 8.38

• 2.09

• 33.49

• 14.19

Find the area of the shaded sector. Round to the nearest hundredth.

• 7.92 units ²

• 24.74 units²

• 10.60 units²

• 98.19 units²

If the area of a circle is 25 π in² , then the diameter is?

• 10 in
• 5 in
• 25 in
• pi in