Describe the two-dimensional figures that result from slicing three-dimensional figures

Start lessonBegins with Cross sections · Slides

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Lesson Plan · Guided Notes · Exit Ticket · Re-teach · Homework

Lesson Plan →Objectives, pacing and practice, built from this lesson's brief.
Guided Notes →One page your students fill in and keep.
Exit Ticket →Three items at the end of class. No student accounts.
Re-teach →After an exit ticket: who missed what, and what to do tomorrow.
Homework →Assign practice; it grades itself.

7.G.A.3

7.G.A.3 -- Describe the two-dimensional figures that result from slicing three-dimensional figures, as in plane sections of right rectangular prisms and right rectangular pyramids.

What you'll learn

Define a cross-section as the 2D figure formed when a plane intersects a 3D solid
Identify and name the cross-sections formed by horizontal, vertical, and diagonal plane cuts of a right rectangular prism
Identify and name the cross-sections formed by horizontal and vertical plane cuts of a right rectangular pyramid
Predict the cross-section shape of a given cut before visualizing or verifying it
Explain why the angle and position of the cutting plane determines the shape of the cross-section

Slides

Step through the lesson, or watch it as a narrated video

Cross sections

✓ Start here

Watch as video

Practice

Try it on your own

Exercise

Practice problems, checked as you go

Animated Videos

Short animated explanations of the key idea • 3 animated videos

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