Find the diagonal $ d $ of a rectangle if side $a = 12$ and side $b = 18$.
Answer
$d = 6 \sqrt{ 13 }$
Explanation
To find diagonal $ d $ use Pythagorean Theorem:
$$ a^2 + b^2 = d^2 $$After substituting $ a = 12 $ and $ b = 18 $ we have:
$$ 12^2 + 18^2 = d^2 $$ $$ 144 + 324 = d^2 $$ $$ d^2 = 468 $$ $$ d = \sqrt{ 468 } $$$$ d = 6 \sqrt{ 13 } $$This page was created using
Rectangle Calculator