Question

The angles of quadrilateral are in AP.if the biggst angle is 120º.find the other angles

Answer 1

Answer:

We know that sum of angles of a quadrilateral is 360

Given biggest angle is 120....(i)

Let other angle is (a-d),a,(a+d)

As per our knowledge,

(a-d)+a+(a+d)+120=360

or 3a=240

or a=80.....(ii)

So d=(120-80)/2=40/2=20

Hence a-d=80-20=60.....(iii)

and a+d=80+20=100....(iv)

So four angles are 60,80,100,120

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