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ABC is an isosciles triangle a circle is...

ABC is an isosciles triangle a circle is such that it parses though vertex C and AB acts as a tangent at D for the same circle AC and BC intersects the circle at E and F respectively AC = BC = 4 cm. and AB = 6 cm. also D is the mid-point of AB. What is the ratio of EC : `(AE+AD)`?

A

`1:2`

B

`1:3`

C

`2:5`

D

None of these

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