A trapezoid region and a semicircular end has a radius of 87.5 and region of 250 by 200 a)calculate the perimeter b)Calculate the area in hectares ??

a) To calculate the perimeter, we need to find the total distance around the trapezoid region and the semicircular end.

The perimeter of the trapezoid region can be calculated using the formula:
Perimeter = sum of all sides of the trapezoid
Perimeter = 250 + 200 + 2(87.5) + 87.5π

Perimeter = 250 + 200 + 2(87.5) + 87.5(3.14159)
Perimeter = 450 + 175 + 274.8875
Perimeter = 899.8875

Therefore, the perimeter of the trapezoid region and semicircular end is approximately 899.89 units.

b) To calculate the area in hectares, we first need to find the total area of the trapezoid region and the semicircular end.

The area of the trapezoid region can be calculated using the formula:
Area = 0.5 * (a + b) * h
Area = 0.5 * (250 + 200) * 200
Area = 0.5 * 450 * 200
Area = 45000

The area of the semicircular end can be calculated using the formula:
Area = 0.5 * π * r^2
Area = 0.5 * 3.14159 * 87.5^2
Area = 0.5 * 3.14159 * 7656.25
Area = 12057.733

Total area = Area of trapezoid region + Area of semicircular end
Total area = 45000 + 12057.733
Total area = 57057.733 square units

To convert the area to hectares, we need to divide by 10,000 (since 1 hectare = 10,000 square meters):
Area in hectares = 57057.733 / 10000
Area in hectares = 5.7057733 hectares

Therefore, the area of the trapezoid region and semicircular end is approximately 5.71 hectares.

a) Perimeter

The perimeter of the trapezoid is the sum of the lengths of the four sides. The two parallel bases are 250 units long, and the height is 200 units. The two non-parallel sides are arcs of the semicircle, and their lengths can be calculated using the formula:

```
Arc length = (2 - π - r) - (θ / 360)
```

where:

- r is the radius of the semicircle
- θ is the central angle of the arc

In this case, the radius is 87.5 units, and the central angle is 180 degrees (since it is a semicircle). Therefore, the length of each non-parallel side is:

```
Arc length = (2 - π - 87.5) - (180 / 360) = 282.74 units
```

Therefore, the perimeter of the trapezoid is:

```
Perimeter = 250 + 250 + 200 + 282.74 + 282.74 = 1265.48 units
```

b) Area

The area of the trapezoid is calculated using the formula:

```
Area = (1/2) - (base1 + base2) - height
```

In this case, the bases are 250 units and 200 units, and the height is 200 units. Therefore, the area of the trapezoid is:

```
Area = (1/2) - (250 + 200) - 200 = 45000 square units
```

To convert from square units to hectares, we divide by 10,000:

```
Area = 45000 square units / 10,000 = 4.5 hectares
```

Therefore, the area of the trapezoid is 4.5 hectares.