1. Write down the circumference: C = 31.416 cm. 2. Divide the circumference by pi: d = C / π (d = 31.416 / 3.14159265359) 3. Calculate diameter value: d ≈ 10 cm. So, the diameter of the circular ...

He knew there are 360 degrees in a circle. He could measure the angle of the shadow cast by a tall object in Alexandria. ... Calculate the circumference of the Earth using this equation: ...

We're trying to find circumference, which, as stated earlier, is equal to pi times diameter (c = πd). We know that d is equal to 3√2, so the circumference is equal to pi times 3√2 or 3π√2 ...

To calculate the length of the arc, we need to know what fraction of the circle is shown. To do this, we use the angle and compare it with 360˚. This angle is 144°.

Yes, this is essentially the same equation used to find the circumference of a circle if θ is measured in radians (which it should be). If you make θ equal to 2π, then the length is the same as ...

More simply, the angle at the centre is double the angle at the circumference. Angle OGH (\(y\)) = angle OHG because triangle GOH is also isosceles. Lengths OH and OG are also both radii. Angle ...

He could then use simple proportions to find the Earth's circumference — 7.2 degrees is 1/50 of 360 degrees, ... if the sun's rays are coming in at the same angle at the same time of day, ...

Science teachers in a summer physics class at Southeast Missouri State University relied on shadows Thursday to calculate the Earth's circumference during the summer solstice, the longest day of ...

4. Using an Example: If you have a circle with a 10 cm diameter and need to find its circumference, apply the formula like so: C = π * d. C = 3.14159 * 10. C ≈ 31.42 cm. Thus, the circle’s approximate ...