Find the slant height $ l $ of a cone if radius $r = 11$ and height $h = 15$.
Answer
$l = \sqrt{ 346 }$
Explanation
To find side $ l $ use Pythagorean Theorem:
$$ r^2 + h^2 = l^2 $$After substituting $ r = 11 $ and $ h = 15 $ we have:
$$ 11^2 + 15^2 = l^2 $$ $$ 121 + 225 = l^2 $$ $$ l^2 = 346 $$ $$ l = \sqrt{ 346 } $$This page was created using
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