PLEASE HELP ILL LOVE U FOREVER In Exercise 4, find the surface area of the solid
formed by the net.

Round the approximate value however you need to

Units are in square centimeters.

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Work Shown:

You have the 160 portions correct since 20*8 = 160.

The other pieces are equilateral triangles, in which we use the formula

where x is the side length of the triangle. Plug in x = 8 to get

That's the exact area of one triangle, but we have two of them. Double the result to get

The total surface area is the sum of all the smaller areas

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The exact surface area is square cm.

Using a calculator, you should get

Round this however you need to.

b.my answer is b.

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