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 ...

Example: If a circle has a diameter of 10 units, its circumference would be C = 10 × 3.14 = 31.4 units. 2. Using the Circle’s Radius. Suppose you know only the radius of a circle – half the length of ...

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: ...

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, ...

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°.

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 ...

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 ...

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 ...