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PLEASE HELP!
Marius and his dad build a lamp in the shape
of a triangular prism, open on the top and
bottom
18 in.
20.1 in.
22 in.
18 in
18 in.
How many square inches of canvas did Marius
and his dad use to make the lamp?

PLEASE HELP Marius and his dad build a lamp in the shape of a triangular prism open on the top and bottom 18 in 201 in 22 in 18 in 18 in How many square inches class=

Respuesta :

ElitePanda

Answer:

≈ 1468.59223 in squared

Step-by-step explanation:

1) A=2AB+(a+b+c)h

2) AB= square root of s(s﹣a)(s﹣b)(s﹣c)

3) s=a+b+c / 2

4) A=ah+bh+ch+1 / 2 square root of﹣a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4

5) 18·22+18·22+18·22+1 / 2 x the square root of ﹣184+2·(18·18)2+2·(18·18)2﹣184+2·(18·18)2﹣184≈1468.59223

≈ 1468.59223 in squared

Hope this helps :)

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