Earlier, we looked at pictures of circular objects. One measurement for each object is listed in the table.

Your teacher will assign you an approximation of to use for this activity.

1. Complete the table. Be prepared to explain your reasoning.

   object	radius	diameter	circumference
   wagon wheel		3 ft
   airplane propeller	24 in
   orange slice			20 cm

2. A bug was sitting on the tip of the propeller blade when the propeller started to rotate. The bug held on for 5 rotations before flying away. How far did the bug travel before it flew off?

Hopi (HOH-pee) weavers make baskets by weaving thin strips of yucca onto a circular willow frame.

1. To make a basket with a radius of inches, how long does the piece of willow for the circular frame need to be?

2. If a weaver uses a piece of willow that is 33 inches long, what will the radius of the basket be?

The field inside a running track is made up of a rectangle that is 84.39 m long and 73 m wide, together with a half-circle at each end.

A picture of a field inside a running track. The field inside the track is composed of a rectangle, indicated by two dashed vertical lines labeled 73 meters and a horizontal length labeled 84 point 3 9 meters. There is a semi circle on each vertical side of the rectangle. The running track goes completely around the field and has a width of 9 point 7 6 meters.

1. What is the distance around the inside of the track? Explain or show your reasoning.
2. The track is 9.76 m wide all the way around. What is the distance around the outside of the track? Explain or show your reasoning.