Measurement Session 4: Angle Measurement

In this session, we will investigate angle measurement. We will review appropriate notation and describe angles in terms of the amount of turn. Looking at angles in this way highlights the fact that angle measure is dynamic rather than static -- it changes as the amount of turn changes.

For information on required and/or optional materials for this session, see Note 1.

Part A:
Angle Definition

Part B:
Angles in Polygons

Part C:
Geo-Logo

Homework

In this session, you will do the following:
•	Use the fact that there are 360 degrees in a complete turn to find the measures of angles in polygons
•	Learn about the relationships between the angles within shapes
•	Generalize a formula for finding the sum of the angles in any n-gon
•	Use software to explore the differences between interior, exterior, and central angles
•	Understand the relationships between turns, resulting angles, and the number of sides of a regular polygon


	Throughout the session you will be prompted to view short video segments. In addition to these excerpts, you may choose to watch the full-length video of this session.


	New in This Session:
	acute angle adjacent angles central angle complementary angles congruent angles exterior angle		interior (vertex) angle irregular polygon obtuse angle polygon regular polygon right angle supplementary angles

Next > Part A: Angle Definition

Session 4: Index | Notes | Solutions | Video