vaue of x in simplest radical form

Answer:
square root of 625 is 25.
Step-by-step explanation:
Use the Pythagorean Theorem to find the hypotenuse.
a² + b² = c² where a and b are the sides and c is the hypotenuse
20² + 15² = c²
400 + 225 = c²
625 = c²