If the slice is made parallel to the base, then if the base is a rectangle, the cross-section would be A. rectangle
I think the number of ways is 671?
He had 19 trees to start with. also love the pfp :3
As in this figure two sides of triangle are equal so angle A=B because angle opposite to equal sides are equal so
60+x+x= 180
60+2x=180
2x= 180-60
2x=120
x=120/2
x=60
Therefore B,C is 60