Question

are the three numbers 25,23,7 measurements of a right triangle

Answer 1

what do you have to check?

Answer 2

to see if they are measurements of a right triangle

Answer 3

is it clear or no? pythagoras tells you that the numbers \(a, b, c\) are measurements of a right triangle if and only if \(a^2+b^2=c^2\)
you need only check with these three numbers

Answer 4

so take the smaller two numbers, 7 and 23, square them, add the results together, and see if you get the same thing if you square 25

Answer 5

you will not, but you should try it for yourself. use a calculator