Area Circles Annulus

If r = 12 cm and R = 18 cm, what is the exact area of the shaded region in terms of ㄫ?

• 280ㄫ sq.cm

• 190ㄫ sq.cm

• 180ㄫ sq.cm

• 80ㄫ sq.cm

Analyze the given figure and solve for the exact area of the of the annulus.

• 69π sq. in

• 36π sq. in

• 33π sq. in

• 63π sq. in

This is a ten peso coin from the Philippines. If the small circle inside has a radius of 20 mm and the radius of the coin itself is 26 mm, what is the approximate area of the region shown in the figure?

• 866.64 sq. mm

• 880.64 sq. mm

• 1888.64 sq. mm

• 808.64 sq. mm

A wall clock in the living room has a 3 inches wide frame with a radius of 15 inches as seen in the picture. Solve for the approximate area of the dark frame.

• 224.34 sq. in

• 254.34 sq. in

• 244.34 sq. in

• 154.34 sq. in

Analyze the given figure and solve for the exact area of the of the annulus.

• 75π sq. yd

• 90π sq. yd

• 45π sq. yd

• 95π sq. yd

Which statement best explains how to find the area of an annulus?

• Add the area of the two concentric circles times pi.

• The area of the outer circle is subtracted by the area of the inner circle and the difference multiplied by pi.

• The area of the big circle minus the area of the other circle.

• The radius of the inner circle times the radius of the outer circle.

A 14 -inch pizza was cut into 8 slices. What is the approximate area of one slice of pizza?

• 9.23 sq. in

• 19.23 sq. in

• 19.32 sq. in

• 20.23 sq. in

Tags

CCSS.HSG.C.B.5

find the area of the circle below.

• 100 cm

• 225 cm

• 9 cm

• 28.26 cm

Tags

CCSS.7.G.B.4

What is the radius of a circle with an area of 49π?

• 49

• 10

• 7

• 14

Tags

CCSS.7.G.B.4

What is the area of this circle?

• 12π

• 6π

• 144π

• 36π

Tags

CCSS.7.G.B.4