2x^2+20x+18 Factoring

Answer the questions in the attachment. a rescue helicopter is at point a and a rescue boat is at point e. the helicopter pilot spots boats in distress at points d and c,with angles as marked in the diagram. figure abce is a rectangle. the altitude of the rescue helicopter, represented by ae, is 5000 feet.

Which best explains why this triangle is or is not a right triangle?

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?