Surface Area and Circumference

Mr. Rives’ rotating sprinkler waters his lawn up to a radius of 7 feet. What is the maximum number of square feet of lawn Mr. Rives can expect two sprinklers to cover? Use π≈3.14

Mr. Dean paints the top of a round picnic table. The diameter of the table is 6 feet. The paint he uses comes in a can that covers 18 square feet of surface. How many cans of paint does Mr. Dean need to purchase to paint one coat on the top of the table?

Coach Tipton marks the soccer field each week with striping paint using a roller wheel such as the one shown here. If the distance the wheel travels in one full rotation is 45 feet, what is the radius of the roller wheel? 
Use π≈3

The swinging door at the local ice cream parlor has a circular window. What is the approximate distance around the window, in feet? Use π≈3.14

Randy shops for circular stepping stones for his yard. He finds a stone with a circumference of 36 inches. What is the diameter of the stone, in inches? Use π≈3.14

For the school fair, Helen paints a large bullseye for the beanbag toss. The radius of the innermost circle is 6 inches. The diameter of the middle circle is 2 feet. The diameter of the largest circle is 6 feet. Helen paints the shaded region of the bullseye. How many square feet does Helen paint? Use π≈3.14

The diameter of the pizza below is 16 inches. If there are 8 equal sized slices of pizza, what is the area of each slice?

A park is shaped like a circle. Students determine that to walk along the diameter of the park you would need approximately 76 steps. How many steps would be needed to walk along the outside of the circle?

Stephanie painted a circular plate in potter class. The circumference of her plate is 3π units. What is the area of her plate?

Alyssa wants to tie a ribbon around a basketball.  She needs enough ribbon to wrap around the basketball and 20 inches extra to tie the bow.  The basketball has a 4.2 inch radius.  How many inches of ribbon will she need?