<h3>
Answer: 72</h3>
Divide the 9 inch side into 9 "1 inch" sub-segments
Divide the 4 inch side into 2 "2 inch" segments
Divide the 12 inch side into 4 "3 inch" segments
So we have 9*2*4 = 18*4 = 72 boxes that can fit.
Certin, because they can be any two cards.
There is 720 dif. ways to arrange it.
The correct answer is 4.6
Answer:
area. of triangle=1/2(l×w)=1/2(6×5)=15cm²