Answer:
Hypotenuse or [tex]c = 75[/tex] in.
Step-by-step explanation:
The Pythagorean Theorem is as follows:
[tex]a^2 + b^2 = c^2[/tex] (We know the length of the legs, or a and b, so we can use the formula to find the length of c, or the hypotenuse)
[tex]c^2 = 21^2 + 72^2[/tex] (Simplify)
[tex]c^2 = 5625[/tex] (Take the square root of both sides)
[tex]c = 75[/tex] in.