Two circles touch externally at A. Secants PAQ and RAS intersect the circles at P, Q, R and S. Tangent are drawn at P, Q , R ,S. Show that the figure formed by these tangents is a parallelogram.
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The figure formed by tangents is a parallelogram ABCD.
Total number of secants = 2 = PAQ and RAS
On, joining the tangents -
In ΔMPT and ΔNQT
∠MPT = ∠MTP
∠NTQ = ∠NQT
Thus, MP || NQ
As MP is perpendicular to AD, and NQ is perpendiculat to BC,
Thus, AD || BC,
Similarly, MR || NS
MRis perpendicular to AB and NS is Perpendicular to CD,
Thus, AB || CD,
Since all the sides are parallel, thus ABCD is a parallelogram.
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