The length of a tangent from a point A at distance 5 cm from the centre of the circle is 4
cm. Find the radius of the circle.
of radii 5 cm and 3 cm. Find the length of the chord of
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Step-by-step explanation:
as shown in picture
AO is perpendicular to OP ( tanget is always perpendicular to line joining by centre)
hence, by Pythagoras thereom
OP^2=PA^2+AO^2.
AO^2=OP^2-PA^2
=5^2-4^2
=25-16
= 9
AO=√9
AO=3
r=3cm
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hope this answer attached Will help you
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