Answer:
third side = 25
Step-by-step explanation:
Using Pythagoras' identity in the right triangle
• c² = a² + b² ( c is the hypotenuse and a, b the legs )
here c = third side , a = 15 and b = 20 , then
c² = 15² + 20² = 225 + 400 = 625 ( take square root of both sides )
[tex]\sqrt{c^2}[/tex] = [tex]\sqrt{625}[/tex]
c = 25
That is the length of the third side = 25
