Hello!
You have to use pythagorean theorem since its a right triangle
is always opposite to 90 degrees which means its always the hypthenuse. but for the
and
it can be any side
1.
formula:

=>

=>442=

=>

=>21.02
2.
=>

=>

=>

=>23.23
3.
=>

=>

=>

=>8
Hope i helped! c: