Answers

2014-01-26T12:46:24+05:30
You know that tangents to a circle subtend a right angle on the radius of the circle at the point of intersection with the circumference. here, we are looking at the tangents that are diametrically opposite. they both are perpendicular to the diameter which is a straight line. hence they are both perpendicular to the same straight line which directly implies that they are parallel.
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