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Sagot :
Start with the bottom, which is a 5 by 5 square, and you get 25ft^2 or square feet
Then the four sides. The area for a triangle is 1/2 base*height.
5*8 is 40/2=20
There are four of these sides so 20*4=80.
Add this to the bottom and you get 80+25=105 square units
Then the four sides. The area for a triangle is 1/2 base*height.
5*8 is 40/2=20
There are four of these sides so 20*4=80.
Add this to the bottom and you get 80+25=105 square units
5.
I think you mean pyramids so
surface area
there are triangles on the faces of the pyramids so 1/2BH=SA of 1 of the side so for the whole side
surface are of each side=BH
B=5
H=8
(5)(8)(1/2)=20
4 sides
(4)(20)=80= top surface area
the surface are of the base
(5)(5) =25
25+80=105 sq units
I can't see 6 or 7 so I'm done
I think you mean pyramids so
surface area
there are triangles on the faces of the pyramids so 1/2BH=SA of 1 of the side so for the whole side
surface are of each side=BH
B=5
H=8
(5)(8)(1/2)=20
4 sides
(4)(20)=80= top surface area
the surface are of the base
(5)(5) =25
25+80=105 sq units
I can't see 6 or 7 so I'm done
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