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Question

In the given figure ABC is equilateral. If IB = 6 cm , then IE = ____.


  1. 2.5 cm

  2. 3 cm

  3. 5 cm

  4. 4 cm


Solution

The correct option is B

3 cm


ABC is equilateral .........(Given)

In IBE , IBC=30 .........(Bi bisects ABC)

sin30 = rR ...........(sin30 = 12)

r : R = IE : IB = 1 : 2

IB = 6 cm

IE = 3 cm

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