Area of Circles and Sector Area

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

• 66cm²

• 78.5cm²

• 66.5cm²

• 10m

What is the area of this circle? Round to two decimal places.

A cruise ship has a large, circular window. It has a diameter of 6 meters. What is the window's area?

• 31.25 m²
• 29.55 m²
• 30.36 m²
• 28.26 m²

Tags

CCSS.7.G.B.4

A circular track with a diameter of 60 meters is shown. Shaleah walked around the track 4 times. Approximately how many meters did she walk? (Hint: This refers to last weeks lesson.)

• 377

• 2826

• 754

• 11,304

Rocky has a choice between 2 pizzas: a circular pizza with a 10-inch diameter, and a square pizza with a 9-inch side. Which statement below is true?

• The pizzas have the same area.

• The area of the square pizza is larger.

• The area of the circular pizza is larger.

• The area of the circular pizza is 100 square inches.

A farmer grows potatoes on a circular plot of land that has a radius of 20 meters. Each potato plant requires 2 square meters of soil. What is the maximum number of potato plants the farmer can grow?

• 80

• 628

• 1256

• 2512

In the equation (x-3)²+(y-2)²=16, the center of the circle is...

• (3,2)
• (-3, -2)
• (-2, -3)
• (2, 3)

Tags

CCSS.HSG.GPE.A.1

Find the area of the shaded sector of the circle.

• 
• 
• 
• 

Tags

CCSS.HSG.C.B.5

Find the area of the shaded sector of circle O.  The radius is 6 inches and the central angle is 100°.  Express answer to the nearest tenth of a square inch.

• 9.2 sq. in.
• 10.5 sq. in.
• 31.4 sq. in.
• 38.2 sq. in.

Tags

CCSS.HSG.C.B.5

In a​ circle, a 90° sector has area 64π in². What is the radius of the​ circle?

• 16 in

• 32 in

• 64 in

• 128 in

Tags

CCSS.HSG.C.B.5