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 parallelogram to determine how much material should be purchased. Be sure to explain how to decompose this shape into rectangles and triangles. Describe their dimensions and show your work. Parallelogram with base of 20 feet, height of 15 feet, and triangular base of 4 feet.

360ft²

Step-by-step explanation:

First of all, you have to consider the geometric shapes you could use in order to represent the mainsail. A sail is typically represented in the way of a rhombus, which makes sense considering they are telling you that you have to decompose the shape into rectangles and triangles.

Such triangle can have the following dimensions:

Triangle (Dimensions)

Base = 4ft

Height = 15ft

On the other hand, the rectangle can have the following dimensions:

Rectangle (Dimensions)

15 ft x 20ft

To get the area of the mainsail, you need to add up the sum of the areas of each individual part.

Obtaining each area:

Rectangle: 15x20 = 300ft²

Triangle #1: 1/2(4*5) = 30ft²

Triangle #2: 1/2(4*5) = 30ft²

Add all areas up:

300 ft²+30ft²+30ft² = 360ft²

Hope it helped u if yes mark me BRAINLIEST.... My fingers r paining....

Tysm!

You can find the area of a rectangle by multiplying the length and height. so multiply 1/2*7/4(which is the simpler version of 1 3/4) and you get 7/8 as your answer.

Ithink it is15not sure tho