Here are three important theorems about triangles: sum of angles of a triangle, the measure of the exterior angle, and the base angles of an isosceles triangle. Sample problems where these are applied are also provided. The problems involved the concept of ratio. Theorem: The Sum of the Angles of a Triangle The sum of
Cumulative Frequency corresponding to a particular value is the sum of all the frequencies up to and including that value. Box and whisker plots show the spread of data split in quartiles. Here’s a quick tutorial by Ben Rouse for constructing cumulative frequency graph and box and whisker plot.