Find the area $ A $ of a triangular prism if side $a = 18$ and length $l = 20$.
Answer
$A = 1360.5922$
Explanation
To find area $ A $ use formula:
$$ A = \frac{ a^2 \sqrt{3}}{2} + 3 a l $$After substituting $ a = 18 $ and $ l = 20 $ we have:
$$ A = \frac{ 18^2 \sqrt{3}}{2} + 3 \cdot 18 \cdot 20 $$$$ A = \frac{ 324 \sqrt{3}}{2} + 3 \cdot 360 $$$$ A = \frac{ 324 \sqrt{ 3 }}{2} + 1080 $$$$ A = 162 \sqrt{ 3 } + 1080 $$$$ A = 1360.5922 $$This page was created using
Triangular Prism Calculator