To find the length of a hypotenuse, we use the Pythagoras Theorem.

Where we know the side lengths (A , B)

And c is the hypotenuse length :)
Answer:
27/5 or 5 2/5
Step-by-step explanation:
Orange line
Rise : 2
Run : 3
Slope: 2/3
I think it should perpendicular because these lines are intersecting at the start point.
First, find out c
4c=-12, so c=-3
-5c=d, so d=15