Classifying Two-Dimensional Figures by Examining Their Properties

This lesson teaches how to classify two-dimensional figures by examining their properties, such as the number of sides and angles. It explains the use of prefixes to determine the number of sides and describes different types of angles, including right, obtuse, and acute angles. The lesson also addresses common misunderstandings and applies classification to identify specific figures like trapezoids and heptagons.

Describe the significance of a right angle in classifying angles.

What are obtuse and acute angles, and how do they differ?

How would you classify a figure with seven sides and seven angles?