What is formula for calculating circumference?

The perimeter or circumference of the circle can be found using the equation C=2π(r), where r= the radius of the circle. Since we have two semi-circles we can find the circumference of one whole circle with a radius of 4, which would be 8π.

What are the 2 circumference formulas?

Formula 2: When the diameter of a circle is known….Summary.

Circumference of Circle	2πr
Area of circle	πr2
Perimeter of semi-circle	πr + 2r
Area of semi-circle	πr2/2

How do you calculate the latitude?

Use the sight line on the top of the aiming beam to align the beam with the North Star. Use the protractor to measure the angle between the beam and the horizon (which is 90º to the plumb line). This angle is your latitude.

What is the formula to find circumference with area?

The formula C = 2√πA is designed to find a circle’s circumference using the area (A). Alternatively, you can solve the equation A = πR2 in reverse to find R, then plug R into the circumference equation. Both equations provide the same result.

How do you calculate radius from circumference?

To find the radius from the circumference of a circle, you have to do the following:

1. Divide the circumference by π, or 3.14 for an estimation. The result is the circle’s diameter.
2. Divide the diameter by 2.
3. There you go, you found the circle’s radius.

What is the circumference of 4 cm circle?

The circumference is 8πcm or 25.12cm .

How do you calculate the circumference of the Earth along latitude?

In calculating the circumference of the earth along this latitude it has to be assumed the earth is perfectly spherical and using the formula C =2πr, where C is the circumference and r the radius. At the equator, the diameter of the earth is roughly is roughly 12,760km and decreases progressively towards both the north and south poles.

What is the circumference of the circle at the equator?

Circumference of a circle is equal to 2πr where r is it’s radius. On the Earth, the circumference of the sphere at a given latitude is 2πr(cos θ) where θ is the latitude and r is the radius of the Earth at the equator.

How do you find the radius of a curve from latitude?

So, to find the radius, we need to relate geodetic latitude to geocentric latitude. Let’s start from tangent of our curve, which can be obtained by differentiating curve equation. This is the vector that points along the curve (along T -line on the figure). We can rotate it clockwise 90 degrees and get normal vector which points along N-line.

How do you find the geocentric latitude from the reduced latitude?

Multiply the tangent of the latitude by b/a; that gives you the tangent of the reduced latitude. Multiply the tangent of the reduced latitude by b/a to get the tangent of the geocentric latitude. (earth’s equatorial radius times the cosine of the reduced latitude) divided by the cosine of the geocentric latitude.