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liraira [26]
3 years ago
15

How do u find the surface of each prism and pyramid

Mathematics
2 answers:
olga_2 [115]3 years ago
8 0
The surface area of a rectangular prism is SA = 2wl + 2lh + 2hw, where w is the width, the l is the length, and the h is the height. 
(7#)So plug in the numbers (It doesn't matter what order). Lets make 3 the width(w), 3 the length(l), and 5 the height(h). 
So then plug it in.
SA= 2(3)(3)+2(3)(5)+2(5)3
Solve the equation. And then you get your answer.

Follow the formulas for the rest


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egoroff_w [7]3 years ago
3 0
7.

SA=2(LW+WW+LW)

SA=2(3*5+3*3+3*5)=54cm²

8.SA=LW+1/2bh+lW


SA=10×17+1/2×15×8+8×10

SA=310cm²

SA=L²6

SA=(6)²6= 216cm²

10.SA=Base²+2(base ×apothem)

SA=(20)²+(1/2(15)20)4= 1000cm²

11. SA= 2(base×height)+base²

SA=2(9*12)+9²

SA=537 cm²

12. SA= base²+2base×height

SA=15²+2(15×20.5)

SA=840 cm²



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