In this session, you will use dynamic geometry software to construct figures with given characteristics such as perpendicular segments, parallel segments, and segments that are equal in length. You will also use this software to discover properties of parallel lines and circles. You will look at some formal geometric definitions, but the emphasis will be on the discovery of properties and relationships among geometric figures.

Part A:	Introduction to Geometer's Sketchpad
Part B:	Parallel Lines
Part C:	Circles
Part D:	Thinking with Technology
Homework

In this session, you will do the following:

Learn how to use dynamic geometry software to construct geometric figures and explore their properties

Learn about the properties of angles formed when a pair of parallel lines is cut by a transversal

Learn to use the properties of circles to make different constructions

Consider the advantages and disadvantages of using dynamic software in studying geometry

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.

Previously Introduced:

New in This Session:

line
plane
point
quadrilateral
ray
vertex

central angle
circle
diameter
inscribed angle
parallel lines
radius
transversal

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