Answer:

Explanation:
Hi there,
In order to solve this problem, you have to know the Pythagorean Theorem:
+
=

We can see from the graph that line segment ML and LN are 6 and 3 units respectively. Since we know the lengths of two sides of the triangle, we can use the theorem above to find the hypotenuse (MN).
⇒
+
=

⇒ 45 =

⇒ c =

Hope this explanation helps. Cheers.