Respuesta :
Answer:
398 ft²
Step-by-step explanation:
Assuming you have correctly described the total area in terms of non-overlapping triangles and a rectangle, you can put the dimensions into the appropriate area formula and add up the pieces.
Triangle area = 1/2·bh
Rectangle area = bh
___
So, the first triangle has an area of ...
1/2·(20 ft)(20 ft) = 200 ft²
The second triangle has an area of ...
1/2·(6 ft)(6 ft) = 18 ft²
The rectangle has an area of ...
(30 ft)(6 ft) = 180 ft²
And the area total is ...
200 ft² +18 ft² +180 ft² = 398 ft²
The area of the polygon is 220.5 ft².
Given that, a six-sided polygon includes two isosceles right triangles, one with a height and base of 15 feet, the other height and base of 4 feet, and one rectangle measuring 25 feet by 4 feet.
What are the formulas to find the area of triangle and rectangle?
The area of the triangle is 1/2×base×height and the area of the rectangle area is length×breadth.
The area of the first triangle is 1/2×15×15=112.5 ft².
The area of the second triangle is 1/2×4×4=8 ft²
The area of the rectangle is 25×4= 100 ft²
The total area=112.5+8+100=220.5 ft²
Therefore, the area of the polygon is 220.5 ft².
To learn more about the area of a rectangle visit:
https://brainly.com/question/12019874.
#SPJ2