Circles and Arcs

Fins the area of this quarter circle with a radius of 6 cm.

• 56.52 cm

• 113.04 cm

• 28.26 cm

• 37.68 cm

If the area of circle is 100 π , find the radius of the circle.

• 10 π

• 10

• 50

• 50 π

If the circumference of a circle is 22π , what is the diameter?

• 22 ft

• 11 ft

• π ft

• 0 ft

which segment above represents the diameter

• BC

• AC

• BD

• LM

Which of the following names a diameter?

• segment AC

• segment DB

• segment AB

• segment BC

What is the area of this circle?

• 1256.64

• 31.41

• 314.16

• 123.12

Find the radius of the circle

• 20 ft

• 10 ft

• 5.5 ft

• 10

what is the area of this semicircle ?
d = 8 cm 

• 100.48 cm²

• 80 cm²

• 200.96 cm²

• 25.12 cm²

what is the formula for finding the area of a semi-circle

• A = π r²

• C = π r²

• A = π r² / 2

• A = 2 π r

If the radius of a circle is 7 cm, what is the length of the arc subtended by a central angle of 60 degrees?