# Find the Surface Area pyramid (20)(20)(15)

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 , and and represent the slant height on the length and slant height on the width.
Substitute the values of the length , the width , and the height into the formula for surface area of a pyramid.
Simplify each term.
Multiply by .
Apply the product rule to .
Raise to the power of .
Raise to the power of .
Raise to the power of .
To write as a fraction with a common denominator, multiply by .
Combine and .
Combine the numerators over the common denominator.
Simplify the numerator.
Multiply by .
Rewrite as .
Simplify the numerator.
Rewrite as .
Factor out of .
Rewrite as .
Pull terms out from under the radical.
Simplify the denominator.
Rewrite as .
Pull terms out from under the radical, assuming positive real numbers.
Cancel the common factor of .
Factor out of .
Cancel the common factor.
Rewrite the expression.
Multiply by .
Divide by .
Raise to the power of .
Raise to the power of .
Rewrite as .
Factor out of .
Rewrite as .
Pull terms out from under the radical.
Multiply by .
Calculate the approximate solution to decimal places.
Find the Surface Area pyramid (20)(20)(15)

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