Question 224369
.5X+30+X-2+X=378
2.5X=378-30+2
2.5X=350
X=350/2.5
X=140 IS THE LENGTH OF THE LONGEST SIDE.
.5*140+30=70+30=100 IS THE SHORTEST SIDE.
140-2=138 FOR THE MIDDLE LENGTH SIDE.
pROOF:
140+100+138=378
378=378