A school's wrestling mat is a square with 50 ft sides. A circle 28 ft in diameter is painted on the mat. No wrestling is allowed outside the circle. Find the area of the part of the mat that is NOT used for wrestling. Use pie=22/7.

area=50^2-PI*14^2

To find the area of the part of the mat that is not used for wrestling, we need to find the difference between the area of the entire mat and the area of the circle.

So let's break it down step by step:

1. Find the area of the entire mat:
The mat is a square with sides of 50 ft. To find the area of the square, we multiply the length of one side by itself.
Area of the square = (50 ft) x (50 ft) = 2500 ft²

2. Find the area of the circle:
The circle has a diameter of 28 ft, so to find the area of the circle, we can use the formula:
Area of the circle = π x (radius)²
where the radius = (diameter) / 2.
In this case, the radius = 28 ft / 2 = 14 ft.
Area of the circle = (22/7) x (14 ft)² = (22/7) x (196 ft²) = 616 ft² (approx.)

3. Find the area not used for wrestling:
By subtracting the area of the circle from the area of the entire mat, we can find the area that is not used for wrestling.
Area not used for wrestling = Area of the mat - Area of the circle
= 2500 ft² - 616 ft²
= 1884 ft²

Therefore, the area of the part of the mat that is not used for wrestling is 1884 ft².