Areas of Circle Using Radius

The largest cookie ever baked measured a radius of 51 feet.  Which of these is the closest to the area of the cookie?  

• 2601 ft²

• 8167 ft²

• 2042 ft²

• 162 ft²

Find the area of the circle

• 43.96

• 153.86

• 87.82

• 307.72

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

• 66cm

• 78.5cm

• 66.5cm

• 10m

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.

• 25.2 in²

• 28.5 in²

• 31.4 in²

• 38.2 in²

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

• 9.42 u²

• 113.10 u²

• 284.3 u²

• 452.39 u²

If the sum of areas of two circles with radii R₁ and R₂ is equal to the area of the circle of radius R then 

• R₁ + R₂ = R

• (R₁)² + (R₂)² = R²

• R₁ + R₂ < R

• (R₁)² + (R₂)²  R²

The area of the circle that can be inscribed in a square of side 6 cm is

• 36pi sq.cm

• 18pi sq.cm

• 12pi sq.cm

• 9pi sq.cm

The region bounded by two radii and corresponding arc of a circle is

• A) Segment

• B) Sector

• C) Area

• D) Perimeter

Find the area of the circle below.

• 100 cm

• 225 cm

• 9 cm

• 28.26 cm

A cathedral window is built in the shape of a semicircle. If the window is to contain three stained glass sections of EQUAL SIZE, what is the area of the YELLOW SECTOR?

• 3.3 ft²

• 4.5 ft²

• 6.3 ft²

• 7.1 ft²