False.
Pythagorean theorem is the equation we use to check this.
Pythag' looks like this: A² + B² = C²
So 5² = 25
7² = 49
25 + 49 = 74
The root of 74 is 8.6....NOT 8 even. (8² = 64 anyways...)
As such, the 3 numbers listed do NOT make a right triangle.
Hope I could help!! :)