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Mathematics 12 Online
OpenStudy (anonymous):

Pyramid Prism Surface Area = p = perimeter of base = slant height B = area of base l = 7 w = 7 h = 16 Area of the sides = 1/2 (28 · 16) Area of the sides = 1/2 · (448) Area of the sides = 224 Area of the base = ( 7 · 7 ) Area of the base = 49 Surface area = 224+ 49 Surface area = 273 my question is how they get the 28 ?

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