Atriangle has exactly three sides. prove the conditional by proving the contrapositive. if a polygon has more than three sides, then it is not a triangle. contrapositive: if then since the contrapositive is the original statement must be

You’re repairing a large rectangular aquarium. the final step is to cover the glass with a protective film. the front and back of the aquarium measure 4 meters by 2 meters, and the sides of the aquarium measure 3 meters by 2 meters. how many square meters of protective film do you need? ( )