Question 146675: if four parallel lines intersect seven parallel lines. how many parallelograms are made?
it turns out as a grid with 18 boxes. (3x6). i sure there would be an equation that would short cut actually counting up all the parallelograms.: if four parallel lines intersect seven parallel lines. how many parallelograms are made?
it turns out as a grid with 18 boxes. (3x6). i sure there would be an equation that would short cut actually counting up all the parallelograms. Answer by edjones(2415) (Show Source):
