Given that the triangle is a right triangle, then we can use the Pythagorean theorem to find the missing side. The Pythagorean theorem states:
c² = a² + b²
where a and b are the legs, and c is the hypotenuse of the triangle.
Substituting with a = 4 and c = 7, and solving for b:
7² = 4² + b²
49 = 16 + b²
49 - 16 = b²
33 = b²
√33 = b
