Space Figures & Cross Sections

 Describe the two-dimensional figures (cross sections) that result from slicing three-dimensional figures, as in plane sections of right rectangular prisms, right rectangular pyramids, cones, cylinders, and spheres. 

• •What are cross sections?

  
  

  •What plane figures can I make by slicing a cube by planes?

  
  

  What about when I slice cones, prisms, cylinders, and pyramids instead of cubes

A left to right slice is parallel to the base.

An up and down slice is perpendicular to the base.

A diagonal slice is at an angle.

This will always give you the shape of the base!

This will always give you the shape of the face

parallel gives you a circle

perpendicular gives you a rectangle

• perpendicular (vertical) gives you a triangle

• parallel gives you a rectangle

parallel gives you the shape of the base, which is a triangle

perpendicular to the base would give you a rectangle

parallel=circle

perpendicular=triangle

Circle no matter how you slice it

If you slice a square pyramid without going through the top (Vertex) you will get a trapezoid

will give you a stretched out base

Geometry Unit 11

Put this example in your notes!!!

Put this example in your notes!!!

Put this example in your notes!!!