Finding Missing Edge Lengths on Composite 3D Prisms

This video tutorial teaches how to identify missing edge lengths in composite 3D prisms by locating parallel edges. It begins with a basic example using rectangles to explain that parallel sides are congruent. The tutorial then progresses to identifying parallel sides in composite figures and solving for missing line segments. Finally, it covers working with 3D composite figures made up of rectangular prisms, demonstrating how to use parallel edges to find unknown lengths.

What can you conclude about the lengths of parallel sides in rectangles?

How can you determine the length of an unlabeled side that runs parallel to a known side?

Explain how you would find the missing horizontal line segment in a composite figure.

What information do you need to identify the edge lengths of a composite 3D prism?

Describe the process of determining the length of a red edge in a composite figure.