Question

Please help surface area of a triangle

Answer 1

A≈391.18

Explanation:

The formula to find the surface area of a triangular prism is as follows:

Surface area = (Perimeter of the base × Length of the prism) + (2 × Base Area)

Plug in . .

A=ah+bh+ch+
`(1)/(2)`
`√( a4+2(ab)2+2(ac)2﹣b4+2(bc)2﹣c4)`

A = 6 * 20 + 6 * 20 + 6 * 20 +
`(1)/(2)` *
`√(64 + 2 * (6 * 6)2 + 2 * (6 * 6)2 - 64 + 2 *(6 * 6)2 * 64)`

A≈391.18

Answer 2

391.2 square cm

Explanation:

Surface area of triangular prism

l = 20 cm

Base area = 15.6 square cm

`\sf \boxed{\text{Surface area of triangular prism = Perimeter of base * l + 2*base area}}`

= (6+6+6)*20 + 2*15.6

= 18*20 + 31.2

= 360 +31.2

= 391.2 square cm