Question

A triangular prism is 30 mm long. The measurements of its triangular face are 14 mm, 11.3 mm, and 10 mm. If the base is 14 mm, the height of the triangular face should be 8 mm.evaluate its
surface area.

Answer 1

Final Answer: 1115mm²

Step by step: Follow image and the operations:

$\bold{\text{Triangle:}\,\dfrac{14\times 8}{2}=\,56\text{mm}^2}$

$\bold{\text{Faces:}\,\underbrace{30\times 11.3}_{339}+\underbrace{30\times 14}_{420}+\underbrace{30\times 10}_{300}}\to\\\\\\\bold{\text{Faces:}\,339+420+300=1059\text{mm}^2}$

$\bold{\text{TOTAL:}\,\,56\,+\,1059=\underbrace{1115\,\text{mm}^2}_{\text{Final\,Answer}}}$