Question 243200
Let x, x+2 & x=4 be the 3 even integers. 
x+x+2+x+4=186
3x=186-2-4
3x=180
x=180/3
x=60 cm. for the shortest side.
60+2=62 cm. for the middle side.
60+4=64 cm. for the longest side.
Proof:
60+62+64-186
186=186