Mr. Morris is going to save money and replace his sailboat's mainsail himself. He must determine the area of the mainsail in order to buy the correct amount of material. Calculate the area of the polygon. Be sure to show all of your calculations in the box: Parallelogram with base of 15 feet, height of 10 feet, and triangular base of 2 feet.

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To make this a square, you already have one of the triangles shown for a split.  You have the dotted line making the first triangle, the vertical base is 4 ft, and horizontal base is 15 ft,  it is the same on the other side.  Then you have a square that is 16 ft on all sides.  The total area is 286 ft

Step-by-step explanation:

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