Area Sectors Circles Triangles Regular Polygons

Does this picture show the diameter or radius of a circle?

• Diameter

• Radius

what is the area of the circle ?
r=5ft  d=10ft

• 78.5ft

• 25ft

• 78.5cm

• 10ft

Find the area of the shaded region.

• 13.5

• 54

• 67.5

• 13.5

If my diameter is 19 inches, what is my radius?

• 38 inches

• 9.5 inches

• 59.66 inches

• 119.32 inches

What is the area of this circle?

• 4π

• 8π

• 16π

• π

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

What is the area of this circle? Leave your answer in terms of pi.

• 25π m²

• 10π m²

• π m²

• 5π m²

What is the area of the shaded region? Leave answers in terms of π.

• ⅜π

• 8/3π

• ⅔π

• 4/3π

In circle O, the radius is 4, and the measure of minor arc AB is 120 degrees. Find the length of minor arc AB to the nearest integer.

• 5

• 9

• 8

• 6

Find the arc length.  Leave your answer in terms of π.

• 7/4π

• 7/2π

• 1/8π

• 45π