Circle Graph - Math Online Tutoring

Circle Graph - Math Online Tutoring A circle is set of all the points that are in the same plane and equidistant from a central point. The radius of acircle is a line segment that joins center of the circle and any point on the circle. The circle graph is a graphdrawn in the shape of a circle and is divided into sectors. Each of these sectors represents a part of a dataset. These sectors may be mostly represented as percentage. This circle graph is also called pie chart. Thiscircle graph is a very useful tool and may be better explained by the following examples. Example 1: A collection of 100 people are sitting in a room. These are 3 colored chairs; 40 sittingon red, 30 sitting on blue, and 30 sitting on green. Calculate the percentage of people on these 3types of chairs. Solution: Total no of people are 100 Percentage on red chair = 40/100 x 100= 40% Percentage on blue chair = 30/100 x 100= 30% Percentage on green chair = 30/100 x 100= 30% Example 2: In a traffic jam, we have 30 Zen, 20 Santro, 25 Nano and 15 WagonR. Find thepercentage of the types of cars. Solution: Total cars = 30+20+25+15 = 90 Percentage of Zen = 30/90 x 100 = 33.33% Percentage of Santro = 20/90 x 100 = 22.22% Percentage of Nano = 25/90 x 100 = 27.77% Percentage of WagonR = 15/90 x 100 = 16.66%