Find the Surface Area pyramid (7)(10)(18)

Math
h=7l=18w=10
The surface area of a pyramid is equal to the sum of the areas of each side of the pyramid. The base of the pyramid has area lw, and sl and sw represent the slant height on the length and slant height on the width.
(length)⋅(width)+(width)⋅sl+(length)⋅sw
Substitute the values of the length l=18, the width w=10, and the height h=7 into the formula for surface area of a pyramid.
18⋅10+10⋅(182)2+(7)2+18⋅(102)2+(7)2
Simplify each term.
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Multiply 18 by 10.
180+10⋅(182)2+(7)2+18⋅(102)2+(7)2
Divide 18 by 2.
180+10⋅92+(7)2+18⋅(102)2+(7)2
Raise 9 to the power of 2.
180+10⋅81+(7)2+18⋅(102)2+(7)2
Raise 7 to the power of 2.
180+10⋅81+49+18⋅(102)2+(7)2
Add 81 and 49.
180+10⋅130+18⋅(102)2+(7)2
Divide 10 by 2.
180+10130+18⋅52+(7)2
Raise 5 to the power of 2.
180+10130+18⋅25+(7)2
Raise 7 to the power of 2.
180+10130+18⋅25+49
Add 25 and 49.
180+10130+1874
180+10130+1874
Calculate the approximate solution to 4 decimal places.
448.8594
Find the Surface Area pyramid (7)(10)(18)

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