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katrin2010 [14]
10 months ago
6

I need help on a question

Mathematics
1 answer:
schepotkina [342]10 months ago
3 0

Given the figure of a regular pyramid

The base of the pyramid is a hexagon with a side length = 6

The lateral area is 6 times the area of one of the side triangles

So, the side triangle has a base = 6

The height will be:

\begin{gathered} h^2=6^2+(\frac{\sqrt[]{3}}{2}\cdot6)^2=36+27=63 \\ h=\sqrt[]{63} \end{gathered}

so, the lateral area =

6\cdot\frac{1}{2}\cdot6\cdot\sqrt[]{63}=18\sqrt[]{63}

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Answer:

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The first answer would be incorrect because the sides aren't the same from the bigger on to the smaller.

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