Describe one way to find the sum of the angles in a quadrangle with out using a protractor.

There is a way to measure the sum of the interior angles which depends upon the number of sides of the polygon. See here for more information:

www.algebralab.org

www.algebralab.org

Alison mom made her a clown suit for a costume party.the collar was made from 8triangular pieces of fabric.what is the sum of the measure of the angles of the triangles used to make her costume?