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hjlf
2 years ago
12

This square pyramid has a surface area of 16 m2.

History
1 answer:
ExtremeBDS [4]2 years ago
3 0

Answer:

The surface area increases by 4 times.

Explanation:

Surface area of a square pyramid:

A = b^{2} + 2b \sqrt{\frac{b^{2}}{4} +h^{2} }

Where:

A = surface area

b = base edge

h = height

Doubling the values gives us a b = 4 and h = 6.

Putting those into the equation gives us:

A = 4^{2} + 2(4) \sqrt{\frac{4^{2}}{4}+6^{2} }

A = 16 + 2(4)\sqrt{\frac{4^{2}}{4}+6^{2} }

2(4)\sqrt{\frac{4^{2}}{4}+6^{2} } = 16\sqrt{10}

A = 16 + 16\sqrt{10}

And the decimal approximation:

A = 16 + 16\sqrt{10} = 66.59

Which roughly equals to 4 times the first surface area.

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