Find the area $ A $ of a triangular prism if side $a = 8.5$ and length $l = 12.8$.
Answer
$A = 388.9703$
Explanation
To find area $ A $ use formula:
$$ A = \frac{ a^2 \sqrt{3}}{2} + 3 a l $$After substituting $ a = 8.5 $ and $ l = 12.8 $ we have:
$$ A = \frac{ 8.5^2 \sqrt{3}}{2} + 3 \cdot 8.5 \cdot 12.8 $$$$ A = \frac{ 72.25 \sqrt{3}}{2} + 3 \cdot 108.8 $$$$ A = \frac{ 125.1407}{2} + 326.4 $$$$ A = 62.5703 + 326.4 $$$$ A = 388.9703 $$This page was created using
Triangular Prism Calculator