1. Calculate the length of the tangent (in cm) which is drawn from a point at a distance of 13 cm from the centre and the largest chord of that circle is 10 cm.
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By: anil on 05 May 2019 02.07 am
Given : Largest chord in a circle is the diameter, => radius OA = $$frac{10}{2}=5$$ cm and OB = $$13$$ cm
To find : AB = ? Solution : In right $$ riangle$$ OAB, => $$(AB)^2=(OB)^2-(OA)^2$$ => $$(AB)^2=(13)^2-(5)^2$$ => $$(AB)^2=169-25=144$$ => $$AB=sqrt{144}=12$$ cm => Ans - (B)
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To find : AB = ? Solution : In right $$ riangle$$ OAB, => $$(AB)^2=(OB)^2-(OA)^2$$ => $$(AB)^2=(13)^2-(5)^2$$ => $$(AB)^2=169-25=144$$ => $$AB=sqrt{144}=12$$ cm => Ans - (B)