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5. Prove that the perpendicular at the point of contact to the tangent to a circle passes
through the centre.
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5. Prove that the perpendicular at the point of contact to the tangent to a circle passes
through the centre.
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Answer:
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Step-by-step explanation:
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Answer:
Given a circle with center O and AB the tangent intersecting circle at point P
and prove that OP⊥AB
We know that tangent of the circle is perpendicular to radius at points of contact Hence
OP⊥AB
So, ∠OPB=90
o
..........(i)
Now lets assume some point X
Such that XP⊥AN
Hence ∠XPB=90
o
.........(ii)
From eq (i) & (ii)
∠OPB=∠XPB=90
o
Which is possible only if line XP passes though O
Hence perpendicular to tangent passes though centre
solution