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Assuming you mean measure it:

One way I can think of is:

  1. find the centre of the partial circle;
  2. draw a radius to one end of the partial circle;
  3. measure it.

To find the centre:

  1. draw any two chords (not parallel to each other);
  2. construct their perpendicular bisectors;
  3. where these meet is the centre of the [partial] circle.
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13y ago
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Wiki User

14y ago

generally; (x-a)2 + (y-b)2 = r2

a = x coordinate of centre of circle

b = y coordinate of centre of circle

r = radius

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Q: How do you find the radius of a partial circle?
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