17.1: Deducing Angle Measures
Your teacher will give you some shapes.

How many copies of the equilateral triangle can you fit together around a single vertex, so that the triangles’ edges have no gaps or overlaps? What is the measure of each angle in these triangles?

What are the measures of the angles in the

square?

hexagon?

parallelogram?

right triangle?

octagon?

pentagon?
