You take half the area of a circle in square feet.
The formula is:
1/2 * pi * (radius)2
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Area of a semi circle: (pi*radius2)/2 square feet
You add the area of the square with the area of the semi circle.
A semi-circle is a 180 degree half circle. A semi-circle does not have any corners. A circle does not have corners either. There are points of beginning and end in a semi-circle. In a circle the point of beginning is the same as the ending point.
yes,meridian is a semi circle
180o is half a circle (semi-circle). To rotate do the following: 180 + 180 = 360o