I believe it is Complimentary
1:
Length: 7
Width:2
Perimeter: 18
2:
Length: 5
Width: 2.8
Perimeter: 15.6
No, the longest side must be less than the sum of the smaller sides or else they won't connect (try it yourself with straw or something)
40+30>120
70>120
false, therfor they canonot be a triangle