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The surface area of a figure is the sum of the area of all surfaces of a figure. Surface Area is often abbreviated S.A. The surface area of a prism or cylinder is the lateral area plus the area of each base. Since the bases for a prism or cylinder are congruent, this is often expressed as twice the area of the base. The surface area of a pyramid or cone is the lateral area plus the area of the single base.
To find the surface area of a right triangular prism we must use this formula: SA = wh + lw + lh + ls. The variables in this formula stand for: w = width h = height l = length s = side. w = width h = height l = length s = side. Let's put this formula to use. You can use a calculator to help.Find the surface area of this right triangular prism. Dimensions are in feet. SA = wh + lw + lh + ls SA = 5(6)+9(5)+9(6)+9(7) SA = 30+45+54+63 SA = 192 ft Here's another one. Find the surface area of this right triangular prism. Dimensions are in inches.urface Area of a Triangular Prism-Lesson Topic Index | Grade 7 Math | Intermediate Test Prep | StudyZone To find the surface area of a right triangular prism we must use this formula: SA = wh + lw + lh + ls The variables in this formula stand for: w = width h = height l = length s = side Let's put this formula to use.