Here's my question : Please don't just given the answer. I need to know how to do it. Thank you.
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Start by drawing a net of this shape. Then evaluate the area of this net by summing the areas of all the pieces.
four squares, all x by x two rectangles, all x by 5x/8 two triangles (each 1/2 base times height) ... sketch an altitude perpendicular to the ground, the use Pythagoras to find the height.
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