Revolving Shapes

Select ALL of the following that can be created by rotating the following 2D object on any of the axes shown.

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Which 2-D shape could be revolved about the vertical line to create the 3-D solid?

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Which 3-D solid is created when the rectangle is rotated about the horizontal line?

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Identify the solid of revolution generated by revolving the region around the fixed line 𝓁.

• A

• B

• C

• D

Which of the following will not have a circle as the cross section

• Perpendicular cut of a sphere

• Parallel cut of a cone

• Perpendicular cut of a cylinder

• Parallel cut of a cylinder

Given a right circular cylinder with a radius of 8 inches and a height of 20 inches. Which of the following choices is NOT a possible cross section of this cylinder?

• circle 

• square

• rectangle 

A student has a rectangular postcard that he folds in half lengthwise. Next, he rotates it continuously about the folded edge. Which three-dimensional object below is generated by this rotation?

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What shape will the vertical cross -section of a cylinder be?

• Circle

• Triangle

• Rectangle

• Ellipse

What shape will the vertical cross -section of a cylinder be?

• Circle

• Triangle

• Rectangle

• Ellipse

Describe the cross section.

• rectangle

• square

• oval

• circle