. where a and b are the sides and c is the hypotehnus (the side in front of the 90 degree angle)
This is a right triangle so I can solve this with the pythagorean theorem.
Set up the equation 22²+x²=25² x would be the third side
Subtract from both sides 484-484+x²=625-484
Find the square root of 141 to get x
The square root of 141 is approximately 11.9 rounded to the nearest tenth.