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2015 10.1 cross sections.notebook
1
May 06, 2015
Mar 309:58 PM
Unit 10. 1 3D figures and Surface AreaI can ...Identify and draw…• nets of 3D figures• cross sections• And find the surface area of prisms and pyramids
Apr 2312:16 PM
Warm Up: Name as many 3D shapes as possible.
Mar 309:58 PM
NET• 2D pattern that folds to form a solid.• http://illuminations.nctm.org/Activity.aspx?
id=3521
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Solid of revolution
• 3D figure created when rotating a 2D figure about a line• Example 1. What 3D figure is created when this triangle is rotated
360 degrees?
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More examples
• Example 2. • Describe the 3D shape created
• Example 3.• Draw the 2D figure that created the 3D
figure
Mar 309:58 PM
CROSS SECTION
• the intersection of a solid and a plane• Shape depends on the angle/cut of the plane
• http://www.learner.org/courses/learningmath/geometry/session9/part_c/index.html • Make a prediction, which of the following shapes can be made from the cross
section of a cube?
2015 10.1 cross sections.notebook
2
May 06, 2015
Mar 309:58 PM
Horizontal and Vertical cuts
• Examples: Given the following, describe the figure created if you made a horizontal and vertical cut.
• 1. 2. 3.
May 58:36 PM
Surface Area of Prisms and PyramidsSurface area is the area of all of the faces of a 3D object.
This is a face
How many faces are in this rectangular prism?
May 58:41 PM
Find the surface area of the following 3D figure
May 58:41 PM
Find the surface area of the following 3D figure