​If you add the areas of the exterior surfaces of a solid figure (what's on the outside), you will have the surface area (SA). It is measured in square units.

​Surface Area: the total area of all of the surfaces of a solid (3-dimensional) shape

​Step one: write the measurements needed to complete this formula.

​Step one: write the measurements needed to complete this formula.

​l = 10n

p = 4s

= 4(6)

=24​

B = s² = 6² = 36​

​Step one: write the measurements needed to complete this formula.

​l = 10

p = 4s

= 4(6)

=24​

B = s² = 6² = 36​

​Step two: replace these values in the formula

1/2(​10)(24) + 36

​Step one: write the measurements needed to complete this formula.

​l = 10

p = 4s

= 4(6)

=24​

B = s² = 6² = 36​

​Step two: replace these values in the formula

1/2(​10)(24) + 36

​Step three: Evaluate using your order of operations. Be sure to attach your correct unit of measure.

SA = 156 cm²​

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