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Question

The angles of a quadrilateral are in the ratio 2:3:5:8. Find the smallest angle of the quadrilateral.

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Solution

Given ratio of angles of quadrilateral ABCD is 2:3:5:8

Let the angles of quadrilateral ABCD be 2x,3x,5x,8x, respectively.

We know, by angle sum property, the sum of angles of a quadrilateral is 360o.

2x+3x+5x+8x=360o

18x=360o

x=20o.

A=2x=2×20o=40o,

B=3x=3×20o=60o,

C=5x=5×20o=100o

and D=8x=8×20o=160o.

The smallest angle =40o.


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