The volume of the triangular prism is 120 cm3
The base length of the isosceles triangle is 8 centimetres
The height of the triangle is 3 centimetres
The side edge of the cross section of triangular prism is 5 centimetres.
What is the surface area?
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Answer:
Volume of right isoceles prism = 1000 cm^3
Length = 20 cm.
Area of one right triangular side = 1000/20 = 50 cm^2
1/2×a^2 = 50 => a^2 = 100 => a = 10 cm.
Base or hypotenuse of right triagular sides =>
√(100 + 100) = 10√2
Lateral surface area =>
(10 + 10 + 10√2)×20 = 682.84 cm^2.
Total surface area => 782.84 cm^2.
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