how is r = AB/2
please answer as soon as possible
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Step-by-step explanation:
According to a theorem, if a chord makes 90 degrees on the circumference of a circle the the chord is the diameter of the circle or the semicircle makes a right angle at any point on circumference.
so here AB makes a right angle on circumference
therefore we know the radius is half of diameter.
r = d/2
r =AB/2
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