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Finding the Surface Area of a Regular Prism Step 1: Find the dimensions of the sides. Step 2: Substitute and multiply. Step 3: Add. Step 4: Write the units. Surface Area = 2(length x width) + 2(length x height) + 2(width x height) Step 1: Length is 4 Height is 7 Width is 3 4 in 7 in Step 2: Substitute and multiply 3 in Area = 2(4 x 3) + 2(4 x 7) + 2(3 x 7) Area = 2(12) + 2(28) + 2(21) Step 3: Add Area = 24 + 56 + 42 The surface area is simply the sum of all of the 6 faces. Area = 122 in 2 Step 4: Write the units

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