Answer to Question #341014 in Geometry for hehehe

Question #341014

the base of a right prism is an equilateral triangle whose edges is 10cm each and its lateral edge is 80 cm. Determine the total surface area of the prism in cm2


1
Expert's answer
2022-05-17T06:47:12-0400

Total surface area of a prism:

S=2B+PhS=2B+Ph

Where

B = Base area

P = perimeter of the base

h = height of the prism

Since we have equilateral triangle, its area is:

B=34a2B=\frac {\sqrt3} 4 a^2

and perimeter is P=103=30cmP=10*3=30 cm

where a is the edge of triangle.

So, the total surface area of a prism:

S=234102+30802486,6cm2S=\frac {2\sqrt3} 4 *10^2+30*80\approx2486,6 cm^2



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