Question 1117101
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Your sample is the Example 1 of the lesson

&nbsp;&nbsp;&nbsp;&nbsp;- <A HREF=https://www.algebra.com/algebra/homework/Surface-area/Surface-area-of-pyramids.lesson>Surface area of pyramids</A>

in this site.


Read it attentively. Then calculate the lateral surface area of your pyramid following that sample.


As the last step, add the area of the base.


That's all.