lesson 12-1
DESCRIPTION
I can identify and use 3-dimensional figures. Lesson 12-1. solid. flat surfaces. polygons. surface. 5 faces. segment. 2 faces. 8 edges. 2 or more. intersection. 5 vertices. 2. parallel. congruent. 2. parallel. congruent. 1. base. point. vertex. shape. base(s). - PowerPoint PPT PresentationTRANSCRIPT
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LESSON 12-1
I can identify and use 3-dimensional figures
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solidflat surfaces
polygons
surface
5 faces
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segment2 faces
8 edges
intersection 2 or more
5 vertices
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2parallelcongruent
2parallel congruent
1 basepoint
vertex
shape base(s)
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Rectangular prism Pentagonal pyramid
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Triangular prism Trapezoidal prism
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Pentagonal prism Square pyramid
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∆ABC , ABED, BEFC,ADFC∆DEF
AB BC CA DE EF FD BE CF ADA, B, C, D, E, F
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ABCDE AB BC CA DE AF BF CF DF EFA, B, C, D, E, F
∆AEF , ∆EDF , ∆DCF , ∆CBF , ∆BAF EA
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parallel basescircles
circularbase vertex
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Cross Section
o A cross section of a solid is the intersection of the solid with a
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plane
circleCross section = slice
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Example 3: Identify the shape of the cross section of each solid. a. b.
circletriangle
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Example 4: Draw a cross section parallel to the base of each solid. Then identify its shape.
a. b.
square circle
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12-1 worksheet
ASSIGNMENT