Surface Area of Pyramids

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Surface Area of Pyramids
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Surface Area of Pyramids
What is a pyramid? Polyhedron with one base and
triangular faces that meet at a vertex How do
you find Surface Area? Sum of the areas of all
the surfaces of a 3-D Figure
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Find the Surface Area.
17.5 cm
go on to see steps
7 cm
8 cm
4
8 cm
Bottom Rectangle 8 x 7 56
Front/Back Triangles
Left/Right Triangles
5
Find the surface area of a square pyramid with
base edge of 4 inches and triangle height of 3
inches.
Base 4 x 4 16
4 Triangles
Surface Area 16 24 40 in2
6
Find the surface area. Be sure to look at the
base to see if it is an equilateral or isosceles
triangle (making all or two of the side triangles
equivalent!).
Triangles (all equal)
Base
6 in
4 in
3.5 in
Surface Area 7 36 43 in2
4 in
4 in
7
42
Which has a greater Surface Area, a square
pyramid with a base edge of 8 in and a height of
4 in or a cube with an edge of 5 in?
A
Square Pyramid
B
Cube
8
43
Find the Surface Area of a triangular pyramid
with base edges of 8 in, base height of 4 in and
a slant height of 10 in.
9
44
Find the Surface Area.
11 m
12 m
6.7 m
9 m
9 m