prove that the tangents drawn at the ends of a diameter of a cicle are parallel
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SEE THE FIGURE AND PLZ CONSIDER "~" as SIGN FOR ANGLE
Let AB be the diameter and PQ and RS be two tangents at it's ends.
We know, tangent is Perpendicular to radius.
so ~1 = ~2 = 90°
As ~1 and ~2 are cointerior angles with sum 180° so PQ||RS
Let AB be the diameter and PQ and RS be two tangents at it's ends.
We know, tangent is Perpendicular to radius.
so ~1 = ~2 = 90°
As ~1 and ~2 are cointerior angles with sum 180° so PQ||RS
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