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If you are a believer, then God did but if you are not, then nobody did. The radius of the earth existed and therefore ots radius did before there was any form of life on earth to invent it.

Q: Who invent radius of earth?

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The total radius of the Earth is approximately 6,371 kilometers.

The radius of the earth is 6400 km.The total surface area is 4*pi*radius square

The radius at the equator is 3,963 miles. It's slightly less through the poles.

The equatorial radius 3,396.2 kilometers (2,110miles).The equatorial circumference of Mars is 21,339 kilometers (13,259 miles).Compared to Earth, the ratio is .533, i.e. the radius and circumference of Mars is about half the radius and circumference of Earth.

with a big tape measure

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Venus has a radius of about 6,052 kilometers, which is about 95% of Earth's radius.

The radius of Earth is approximately 6,371 kilometers.

Venus' radius = 0.95 of Earth's Venus' mass = 0.815 of Earth's

Europa: 1561 km radius Earth: 6371 km radius The diameter is twice the radius.

The radius of Earth is about 0.95 times greater than the radius of Venus.

Earth's radius is about 6,371 km, so Earth's radius is approximately 1.88 times larger than Mars.

Mercury's radius is 0.3825 that of Earth Jupiter's radius is 11.209 that of Earth So: (0.3825/11.209)*100 = 3.41 percent.

Distance from Earth to Moon is approximately 60.34 times larger than radius of Earth.

the moon's radius is about one quarter the radius of earth The moon has no atmosphere and the earth does

Mass: Earth's is 81.7 times the moon's mass.Radius: Earth's is 3.67 times the moon's radius.

Ceres has an average radius of about 470 kilometers; Earth's radius is about 6371 kilometers.

The approximate radius of the Earth's center to it's surface is about 6,371 kilometers, which is about 3.959 miles.