Circle, Area and Circumference Involving Pi

A water sprinkler sends water out in a circular pattern. What area will be watered if the radius of the spray from the sprinkler is 18​ ft?

• 324

• 1017

• 254

• 113

The diameter of Circle J is 18 cm. The diameter of Circle K is 31 cm. Which circle has the greater area and by how​ much?

• The area of Circle K is about 2000 cm2 greater than the area of Circle J.

• The area of Circle K is about 500 cm2 greater than the area of Circle J.

• The area of Circle J is about 2000 cm2 greater than the area of Circle K.

• The area of Circle J is about 500 cm2 greater than the area of Circle K.

You just finished planting​ avocados, carrots,​ radishes, tomatoes, and spinach in her new garden. The garden is a circle whose diameter is 50 yards. If you planted equal regions of each​ vegetable, what is the area of your garden has carrots​?

The figure is made by attaching semicircles to each side of an​ 11-ft-by-11-ft square. Find the area enclosed by the figure.

• 155.54

• 215.99

• 121

• 94.99

The number Pi is extremely useful when solving geometry problems involving ...

• triangles

• curves

• cones

• circles

Pi (π) is the ratio of a circle’s circumference to its.....

• radius

• diameter

• area

• length

The mathematician Archimedes used polygons with many sides to approximate circles and determined that Pi was approximately ....

• 23/7

• 22/7

• 21/7

• 20/7

Pi - usually written as the Greek letter π - is the ‘..... constant’

• pararel

• box

• triangle

• circle

Find the area of the circle

• 43.96

• 153.86

• 87.82

• 307.72

Jayne has a very large circular lollipop that has a circumference of 25.12 inches. What would the diameter of Jayne’s lollipop be? Use π = 3.14.

• 4 in.

• 8 in.

• 12 in.

• 16 in.