How do you find a circumference?
Correct answer: To find the circumference of a circle, multiply the circle’s diameter by pi (3.14).
What is the circumference of Earth?
40,075 km
Earth/Circumference
Who calculated the circumference of the earth answer?
Eratosthenes
Observations and results In 200 B.C. Eratosthenes estimated Earth’s circumference at about 46,250 kilometers (28,735 miles).
What would be the circumference of the Earth use 3.14 for \PIΠ?
Therefore, circumference = 31.4 inches.
What is the circumference of 18?
2 Answers. The answer is 56.57 .
What is the formula for perimeter of circumference?
Learn that the perimeter of a circle has its own special name, called “circumference.” The symbol is a capital C. It is calculated using the formula Pi x diameter, or 3.14 x d = C. It can also be calculated by Pi x (2 x radius) = C or 3.14 x (2 x r) = C. Learn about Pi.
How Eratosthenes calculated the Earth’s circumference?
Eratosthenes then measured the angle of a shadow cast by a stick at noon on the summer solstice in Alexandria, and found it made an angle of about 7.2 degrees, or about 1/50 of a complete circle. Eratosthenes then used this to calculate the circumference of the Earth to be about 250,000 stadia.
How did Eratosthenes calculate the Earth’s circumference?
Eratosthenes hired a man to pace the distance between the two cities and learned they were 5,000 stadia apart, which is about 800 kilometers. He could then use simple proportions to find the Earth’s circumference — 7.2 degrees is 1/50 of 360 degrees, so 800 times 50 equals 40,000 kilometers.
Who calculated the circumference of the Earth Class 6?
ERATOSTHENES CALCULATED THE CIRCUMFERENCE OF THE EARTH.
What is the circumference of Earth at the equator?
40,075 kilometers
The distance around the Earth at the Equator, its circumference, is 40,075 kilometers (24,901 miles). The Earth’s diameter is also wider at the Equator, creating a phenomenon called an equatorial bulge.
What is the circumference of 120cm?
Or to put it another way, the circumference is approximately 3 times bigger than the diameter. Look at the table below and see if you can spot the pattern….Circles (basic)
| Diameter | Circumference(approx) | Circumference |
|---|---|---|
| 8 cm | 24 cm | 25.12cm |
| 20 cm | 60 cm | 62.8cm |
| 40 cm | 120 cm | 125.6cm |
| 3m | 9m | 9.42m |
What is the diameter of the Earth at the Poles?
Its diameter (the distance from one side to the other through Earth’s center) is 7,926 miles (about 12,756 kilometers). Earth is slightly smaller when measured between the North and South Poles which gives a diameter of 7,907 miles (12,725 kilometers). Earth bulges out a bit more around the equator than around…
How did Eratosthenes measure earth?
Eratosthenes accurately measured the radius of the Earth by determining the minimum angle between the Sun’s direction and the vertical at Alexandria on the day of the summer solstice.
How many miles around the world circumference?
It’s a really big planet. But how many miles around the Earth? The equatorial circumference of the Earth is 24,901.55 miles. This is how many miles the Earth is around.
What is the equatorial circumference?
Using those measurements, the equatorial circumference of Earth is about 24,901 miles (40,075 km). However, from pole-to-pole — the meridional circumference — Earth is only 24,860 miles (40,008 km) around. This shape, caused by the flattening at the poles, is called an oblate spheroid.