Question

find the mean of the following grouped data in step deviation method​

Answer 1

Answer:

Angle BOC = 120

PROOF

Angle A + Angle B + Angle C = 180

So, Angle B + Angle C = 120 ( angle A = 60)

Now 1/2 (Angle B + Angle C) = 60

1/2 angle B + 1/2 angle C =60………. I

In triangle BOC

1/2 angle B + 1/2 angle C + Angle BOC = 180

(BO and CO are angle bisectors)

Or 60 + Angle BOC = 180 (Using I)

OR ANGLE BOC = 120

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Hiranya Gupta

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Faizu Shahab M

, studied at Calicut University Institute of Engineering and Technology

Answered September 12, 2017