Cross-sections, Rotations, and Geometric Nets

Secondary Math 3 – Section 8.1

Names of ShapesCircle Square Rectangle

Triangle Trapezoid Pentagon

Hexagon Ellipse Octagon

Names of SolidsCube Prism Cylinder

Sphere Pyramid Cone

What is a cross-section?

Identify the cross-section of this solid.

Identify the cross-section of this solid.

Identify the cross-section of this solid.

Identify the cross-section of this solid.

Identify the cross-section of this solid.

Challenge Question

Can you cut the cube with a plane and create a cross-section with:

a) 3 sides b) 4 sidesc) 5 sides d) 6 sidese) 7 sides f) 8 sides

Cross-section Simulator

Geometric Nets – Example 1

Geometric Nets – Example 2

Geometric Nets – Example 3

Two-dimensional Rotations

What would happen if we rotated the function around the y-axis?

Two-dimensional Rotations

What would you have to rotate to obtain this 3-dimensional solid?