Our teacher ask us when it can be correct i now that if y or x =0
and ?

Step-by-step explanation:

When you take the square root of a number, you want the number inside of the square root to be a positive sign since we can't take the square root of a negative.

So, what would make the a positive?

(x+y) > 0

For each individual one, (Note:

What would make positive?

x > 0

What would make positive?

y > 0

by definition, an arc subtended by a central angle of some given measure has the same measure. so .