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Earn +20 ptsQ: How did they measure the diameter or radius of earth?
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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.
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.
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.
What is the measure of circle in the lifebuoy?
That depends on its diameter or radius
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