Question

(ii) The four angles of a quadrilateral are in the ratio 1:3:7:9. which of the
following is not the angle of this quadrilateral?
(a) 18°
(b) 54°
(c) 126°
(d) 108°​

Answer 1

Answer:

option d - 108°

Step-by-step explanation:

1x + 3x + 7x+ 9x = 180

20x = 360

x = 360/20

x = 18

The angles of the

1x = 18

3x = 54

7x = 126

9x = 162

Hence the only incorrect option is 108° (option d)

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Answer 2

108 degree is not an angle of this quadrilateral