Verified Answer :

truth

ewidence
k - scale similarities
a,b,c = 
sides of the triangle
p - perimeter of a triangle

ka + kb + kc = k(a+b+c) = kp

triangles
a = 3
b = 15
c = 14

triangles 1:2
2a = 23 = 6
2b = 2
15 = 30
2c = 2*14 = 28