Note that the hole in the center of the pie should measure about 60 percent of the circle’s diameter. An alternate way to display similar information is with a dot chart. A 10-by-10 grid of dots can ...

This means each friend is equivalent to 20° in the pie chart. Image caption, Multiply each frequency by 20 to calculate the angles required. Walk = 8 × 20 = 160. Cycle = 2 × 20 = 40.