Question

What is the lateral and surface area? ​

Answer 1

Answer:

L = 324 cm²

S = 359.1 cm²

Step-by-step explanation:

Lateral surface area of a triangular prism is given by,

Lateral surface area = Perimeter of the triangular base × Height

                                  = (9 + 9 + 9)×12

                                  = 27 × 12

                                  = 324 cm²

Surface area area of the triangular prism = Lateral area of the prism + Area of the triangular bases

= 324 + $\frac{1}{2}(Base)(Height)$

= 324 + $\frac{1}{2}(9)(7.8)$

= 324 + 35.1

= 359.1 cm²