Since the rectangle is composed of 2 right triangles, we can apply the Pythagorean theorem to one of the triangles:
c^2 = a^2 +b^2
Where:
c= hypotenuse (longest side) = 15
a & b = the other two legs of the triangle ( x , 3 )
Replacing:
15^2 = 3^2 + x ^2
Solve for x
225 = 9 + x^2
225-9 = x^2
216 = x^2
√216 = x
x= 14.69
So, to find the value of x, we can use:
A. 3^2 + x^2 = 15^2
