In this worksheet you will investigate how to find the area of a triangle.

Investigation:[br][br]1) Move point D so that the triangle is a right triangle, then move the Hint slider, describe the end result. [br][br]2) Move point D to make an obtuse triangle and move the Hint slider, describe the end result. (perform this task for an acute triangle as well)[br][br]3) What conjecture can you make about the formula for area of a triangle? Test this conjecture with 5 different base and height combinations and record your results.

In this worksheet there two polygons; a rectangle and a parallelogram. Use the polygons to complete the investigation below.

Investigation:[br]1) Change the height of the rectangle (h) by moving point C. What happens to the height of the parallelogram? [br]2) Change the width of the rectangle by moving point L. What happens to the parallelogram? [br]3) Find the area of 3 different rectangles and compare the area of each rectangle to the area of the corresponding parallelogram.[br]4) What conjecture can you make about the formula for area of a parallelogram and why? (use the answer to question 3 to guide you)