Question

Find the area of the whole surface of a right triangular prism whose

height is 36 cm and sides of whose base 51,37 and 20 cm,

respectively​

Answer 1

Answer:

In all there are five plane figures, i.e., two triangles and three rectangles. Since both the rectangles are of equal area,

Area of both triangles =s(s–a)(s–b)(s–c)−−−−−−−−−−−−−−−√

Area of both triangles =54(54–51)(54–20)(54–37)−−−−−−−−−−−−−−−−−−−−−−√

Area of both triangles =54×3×34×17−−−−−−−−−−−−−√=612 square meters

Area of all three rectangles =36(51+20+37)=36×108=3888 square meters

Area of the whole surface =3888+612=4500 square meters