Pettit 10-2 Notes D1: Read and interpret graphs 10-2 Circle Graphs D1: Read and interpret graphs

Circle Graphs: Show parts to a whole All circle graphs represent 100% Good for showing survey results 100% 50% 33.3% 33.3% 25% 25% 33.3%

Steps to create a circle graph Find the percent that each part represents (if not given) Convert the percentage to degrees of the circle Example: 18% of 360 = 0.18 •360 ≈ 65° Draw a radius from the center to the side of circle Measure the given degree by lining up protractor with that radius Repeat with remaining sectors Label the sections with the percents & category and give the graph a title

Example: US (1896-2000) Olympic Medals Type Number Gold 872 Silver 658 Bronze 587 % Angles (°) 2,117 100% 360° Add two Columns to table and label % and angle Use steps to create the circle graph How many total medals have been won?

US (1896-2000) Olympic Medals % Angles (°)