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Mathematics 12 Online
Urprettybabygirl15:

Help plzz!!

Urprettybabygirl15:

What is the surface area of the pyramid formed from the net shown here? The triangles are equilateral, and each triangle has a height of 5.2 centimeters. Write your answer rounded to one decimal point and with the correct unit.

Urprettybabygirl15:

Ferrari:

First of all, to find the area, we need to know each smaller triangle's area. Do you know the formula for area of a triangle?

Urprettybabygirl15:

no

Ferrari:

Well, the formula is b x h x 1/2

Ferrari:

(Base times Height times 1/2)

Ferrari:

So, multiply the base of the triangle times the height of the triangle, and then multiply that by 1/2.

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