the legnth of the longest side must be LESS THAN the sum of the measures of the other 2 sides if no longest side (becasue it has 2 longest sides or 3 equal sides), then it can form a triangle
so the longest side is 36
36 must be less than the sum of 15 and 20 36<15+20 36<35 false
therfor it cannot form a triangle try it yourself, you cannot connect them that way