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Laabri

12.1 3D Figures

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Last updated almost 6 years ago
12 Nsɛmmisa
12

You are going to start this lesson with what are polyhedrons.

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5.

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1.

We're moving along to 3D Solids! Drag the word on the left to match the picture on the right.

Draggable itemarrow_right_altCorresponding Item

Rectangular Prism

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Cone

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Sphere

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Triangular Pyramid

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Cylinder

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Triangular Prism

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2.

Tell whether the solid is a polyhedron. Name the polyhedron.

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Click and drag the "Rotate 1", Rotate 2" and "Height". Use the move tool to move around the shape. Describe below how many cross-sections you've see. Name the shapes you've created

Having trouble seeing the link? Click here

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6.

Describe the shape formed by the intersection of the plane and the solid.

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7.

Describe the shape formed by the intersection of the plane and the solid.

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8.

Describe the shape formed by the intersection of the plane and the solid.

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9.

What happens when you rotate a triangle around the y-axis?

Click the play button to see what happens

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We call this solid of revolution. This is a three-dimensional figure that is formed by rotating a two-dimensional shape around an axis. The line around which the shape is rotated is called the axis of revolution.

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10.

What shape is create when you rotate a triangle

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11.

What do you get when you rotate a square?

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12.

What do you get when you rotate a semi-circle?

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3.

Tell whether the solid is a polhedron. Name the polyhedron

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4.

Tell whether the solid is a polhedron. Name the polyhedron