Area of a Triangle

This activity shows why the area of a triangle is half the base times the height.
1) Move the slider and describe the final shape[br][br]2) What is the area formula of a rectangle?[br][br]3) What do the rectangle and final shape share in common?[br][br]4) What is the mathematical relationship between the rectangle and the final shape?[br][br]5) What is the area formula of the final shape?

Information: Area of a Triangle