Question

The question is in the screenshot:

Answer 1

13

Explanation:

First drop the line.

How many units is it from Point
`r` to the x axis?

12.

How many units is it from Point
`r` to the y axis?

5.

Now we can use the Pythagorean Theorem.

`12^5+5^2=c^2`

`144+25=c^2`

`c^2=169`

`c=13`