Trapezoid: Area
Consider each method presented to you below. Clicking on the checkbox next to the method will reveal a slider. Move the slider around to see what the dissection and rearrangement of the trapezoid. Once you have a good idea of what each method does, pick two to describe in detail. In your own words explain what the activity demonstrated for you, and how the given method helps you find the area of a trapezoid.
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First method of choice
Say which method you chose, and explain what the applet demonstrates and how. If you make claims about the shape that is formed, try to back up your claim with evidence (as you did in the triangle applet). Finally, explain how to calculate the area of a trapezoid using that particular method.
Second method of choice
Say which method you chose and explain what the applet demonstrates and how. If you make claims about the shape that is formed, try to back up your claim with evidence (as you did in the triangle applet). Finally, explain how to calculate the area of a trapezoid using that particular method.
Different formulas?
You may have arrived at different algebraic representations for the area. Explain why they should all be equivalent.