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The diameter is a straight line from one side os the circle, through the centre point, to the opposite side of the circle.
The radius is a straight line from one side of the circle to the centre point only.
So Two radii add to make one diameter.
Hence algebrauically,
d = 2r
If d = 0.75
Then
r = 0.75/ 2
r = 0.375
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Earn +20 ptsQ: What is the radius of a circle whose diameter is .75?
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