

Cross Sections 2020
Presentation
•
Mathematics
•
7th Grade
•
Practice Problem
•
Medium
Standards-aligned
Justin Adamson
Used 757+ times
FREE Resource
15 Slides • 6 Questions
1
Cross Sections 2020
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.

2
Cross Sections
•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
3
Multiple Choice
What is a cross section?
2- dimensional view of a 3-D shape
3-D view of a 2-dimensional shape
2- dimensional view of a 2-D shape
4
3 types of slices you will see
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.
5
Horizontal (Parallel) to the base
This will always give you the shape of the base!
6
Vertical (Perpendicular)
This will always give you the shape of the face
7
Multiple Choice
If you slice a shape parallel to the base, what will the cross section be the shape of?
face
base
stretched base
8
Cylinders
parallel gives you a circle
perpendicular gives you a rectangle
9
Multiple Choice
If you slice a shape perpendicular to the base (vertical), what will the shape always be?
face
base
fase
bace
10
Multiple Choice
cone
rectangle
square
triangle
11
Rectangular Pyramids
perpendicular (vertical) gives you a triangle
parallel gives you a rectangle
12
Multiple Choice
a circle
cycloid
parabola
hyperbola
13
Triangular Prisms
parallel gives you the shape of the base, which is a triangle
perpendicular to the base would give you a rectangle
14
Multiple Choice
pyramid
prism
square
triangle
15
Cones
parallel=circle
perpendicular=triangle
16
Spheres
Circle no matter how you slice it
17
Special
If you slice a square pyramid without going through the top (Vertex) you will get a trapezoid
18
Angled slices
will give you a stretched out base
19
Practice
20
Answers
21
Interactive
https://www.geogebra.org/m/XCZwsytr
Cross Sections 2020
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.

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