Art of Problem Solving: Angles in a Triangle Part 1

Address any kind of math concept or problem with a series of problem-solving strategies. Over 12 days of different activities and increasing skills, learners practice different ways to solve problems, check their answers, and reflect...

Building on concepts in the first part of the series on similar triangles, installment number two explores how to find the values for given angles in a triangle. These problems are solved by using algebra and ratios. A step-by-step...

Video tutorial uses problems to reinforce understanding of angles in a triangle. (Part 2) [6:23]

Video tutorial uses examples to reinforce understanding of how the sum of the angles in a polygon always adds up to 360 degrees. [5:09]

Video tutorial uses examples to reinforce understanding of how to find the measure of each angle of a polygon. [9:26]

Video tutorial uses examples to provide practice solving square root problems.(Part 1) [11:32]

Video tutorial uses everyday examples to introduces percentage increases and decreases. (Part 1) [8:24]

Video tutorial provides examples that explore linear equations with fractions. (Part 1) [6:09]

Proof that the sum of the angles in a triangle is 180 using the relationship of angles formed when parallel lines are cut by a transversal. This video also appears in the Geometry: Triangles strand. [6:31]

Are you working on finding the missing angles in triangles in your class? Consider this video. An instructor uses the triangle sum theorem to create an equation that helps her find the missing angles. She explains each step and writes...