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Surface area of cones and pyramids
供稿人: Davis
(原作者: Jackson)
Copy down the formula:
Pyramid:  
perimeter 
of base
L.A. = ½Pl
S.A. = L.A. + B
P
Area of base
Slant height
B
l
What is the surface area of the pyramid?
What is the lateral area of the pyramid?
4cm
6cm
8cm
What is the perimeter of the base?
What is the slant height?
What is the area of the base?
cm
cm
cm
2
cm
cm
2
2
What is the surface area of the pyramid?
What is the lateral area of the pyramid?
5cm
7cm
10cm
What is the perimeter of the base?
What is the slant height?
What is the area of the base?
cm
cm
cm
2
cm
cm
2
2
What is the surface area of the pyramid?
What is the lateral area of the pyramid?
6in
4in
12in
What is the perimeter of the base?
What is the slant height?
What is the area of the base?
in
in
in2
in2
in2
s represents the slant height(some 
people use l for slant height)
h represents height of cone
=5cm
Copy down the formula
r represents radius of circle
L.A. = πrs
S.A. = L.A. + B
B = πr2
=5cm
=7cm
What is the surface areaof the cone? Round to the nearest tenth and use 3.14159 for pi
What is the radius?
What is the slant height?:
cm
cm
cm2
=7cm
=10cm
What is the surface areaof the cone? Round to the nearest tenth and use 3.14159 for pi
What is the radius?
What is the slant height?:
cm
cm
cm2
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