Answer:
Explanation:
here x is hypotenuse because it is the side opposite to largest angle.
12 and 15 are the two other legs of the triangle .so let them be a and b rectively . And let hypotenuse be c.
according to the pythagoras theorem
a^2 + b^2 = c^2
12^2 + 15^2 = x^2
144 + 225 = x^2
369 = x^2

