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How do you calculate the perimeter of a semi circle?
The perimater of a circle is the same as the circumference of a circle, but if it's only a half of a circle (semi-circle) you would use the formula 2*pi*r/2 If it's a quarter of a whole circle, or a fifth of a circle, then you would divide it by 4 or 5.
How many degressin a right angle?
A right angle is always formed by two perpendicular lines. These lines would split a circle into quarters. There are 360 degrees in a circle, so one quarter would be 90 degrees. A right angle is always 90 degrees.
What is the perimeter of a rectangle that is 20cm by 2cm which has a quarter circle of radius 11cm on one 20cm side running off the 2cm side using 3.14 for π?
Normally, the amount of the side of the rectangle below the quarter circle on it would expected to be calculated. However, the radius of the circle equals the amount that is subtracted, but in calculating the perimeter it has to be added back in again as it forms part of the perimeter. Thus the perimeter is the perimeter of the rectangle plus a quarter of the circumference of the circle. → perimeter = 2 × (20cm + 2 cm) + ¼ × 2 × π × 11 cm ≈ 44 cm + 3.14 × 11/2 = 61.27 cm.
How many lot in one quarter acre of land?
In the US, it depends on how the area is zoned. High-density zoning could allow for as many as three lots, but one or two lots would be more typical, since one-quarter of an acre would make a single lot about 110 feet by 100 feet.
Why is the circle city in Baghdad built in a circle?
Because if it were not, it would not be the circle city!
