If 3 points and pi is 3.14 that would have to be equal to 6t
I bealive it is b. ( I had the exact same 7 th grade homework page ad u today;)
K=4 would be the answer you’re looking for
By Pythagorean theorem,
a^2+b^2=c^2
c is the longest side of the triangle
a and b are the remaining sides