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with a big tape measure

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13y ago
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Q: How did they measure the diameter or radius of earth?
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Related questions

How does he find the measure of a radius if he knows the measure of the diameter?

The radius of a circle is half the diameter.


What is Europa's diameter compared to earth?

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


The diameter of a circle is 28 inches what is the measure of the radius?

14 inches radius = 1/2 the diameter diameter = 2 x radius


How do you get the radius of a cylinder?

If you have a physical cylinder to measure, measure the "width" of the circle that is the cross section of the cylinder. That is the diameter, Half the diameter is the radius.


What is planet Earth's diameter?

The mean diameter of Earth is 12,742 kilometers or 7917.5 miles.More specifically, if we quote the accurate values for the radius, it changes depending on where you measure it.Mean radius 6,371.0 km = 3958.8 milesEquatorial radius 6,378.1 km = 3963.2 milesPolar radius 6,356.8 km = 3949.9 miles


If the diameter of a circle is 48 meter what is measure of the radius?

24 meters diameter is simply twice the radius.


What is Earth's diameter compared to Mars'?

The diameter of Mars is just over half the diameter of Earth.To be accurate, it depends on where you measure it.The equatorial radius of Mars is 3,396.2 km which is 0.533 Earth's 6,378.1 km.The polar radius of Mars is 3,376.2 km which is 0.531 Earth's 6,356.8 km.


How do you figure out the circumference of something without knowing the diameter?

If you know the radius, double that to get diameter. If you have neither radius or diameter, then measure around the outside.


The diameter of a circle is 48 meters what is the measure of the radius?

24 meters diameter is simply two times the radius.


What is the radius for 100?

The radius of a circle is 1/2 of its diameter


How do you find the length of of the radius of a circle?

You can either measure it, or calculate it if you know the diameter (radius = diameter / 2), or the circumference (radius = circumference / (2pi)).


How do you find tha radius?

The radius is half the diameter. Draw a line that passes through the centre of the circle and measure it. This is the diameter. Halve it and you will have the radius.