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Help please? 10 points

Help please? 10 points-example-1
User VHristov
by
7.9k points

1 Answer

4 votes

Answer:

277 cm^2

Explanation:

Two of the triangular faces will have areas of ...

A = 1/2bh = (1/2)(8 cm)(11 cm) = 44 cm^2

and the other two will have areas of ...

A = 1/2bh = (1/2)(9 cm)(13 cm) = 58.5 cm^2

The base will have an area of ...

A = LW = (9 cm)(8 cm) = 72 cm^2

So, the total area will be ...

2(44 cm^2) +2(58.5 cm^2) +72 cm^2 = 277 cm^2

_____

Comment on the problem

You could not actually build this pyramid. The height of the peak above the 8-cm edges must be ...

√(11^2 -(4.5)^2) = 10.04 cm

The height of the peak above the 9-cm edges must be ...

√(13^2 -4^2) = 12.37 cm.

The peak cannot be in two places at once. This geometry is impossible.

User VFragosop
by
8.5k points

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