Question
A square whose diagonal is 12√ 2cm is made base of the pyramid. if height of the pyramid is 15cm, then what is the total surface area of the pyramid.(cm 2)
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now total surface area of pyramid =Area of base +1/2 ×perimeter of base ×slant height = (12)2+(4×12)/2 x3√29 =144+72√29 =72(2+√29) cm2