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12 April, 00:48

Circle O has a diameter AB. If A is at (-6, - 2) and B is at (-3, 4), find the length of the radius of the circle. 9.6 units 4.2 units 3.4 units 10.5 units

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  1. 12 April, 01:44
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    Radius is half the distance AB

    = (1/2) sqrt ((y2-y1) ^2 + (x2-x1) ^2)

    = (1/2) sqrt (6^2+3^2)

    =1/2sqrt (45)

    =1.5sqrt (5)

    =3.35
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