Asked by LINDA
A triangular prism measures 81 cm long. Its cross section is an equilateral traingle with a base of 16 centimeters and a height of 14 cm. Find the surface area of this triangular prism.
Answers
Answered by
Jai
Surface area of a prism:
SA = (area of the base) + (lateral area)
Imagine the shape. Triangular prism is the shape of a toblerone box. So,
SA = 2*(area of triangle) + 3*(area of rectangle)
Recall that area of triangle is just
A = bh/2
And area of rectangle is
A = lw
Therefore,
SA = 2(16)(14)/2 + 3(81)(16)
SA = ?
Units in cm^2. Hope this helps~ `u`
SA = (area of the base) + (lateral area)
Imagine the shape. Triangular prism is the shape of a toblerone box. So,
SA = 2*(area of triangle) + 3*(area of rectangle)
Recall that area of triangle is just
A = bh/2
And area of rectangle is
A = lw
Therefore,
SA = 2(16)(14)/2 + 3(81)(16)
SA = ?
Units in cm^2. Hope this helps~ `u`
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