Question

(& The angles of quadrilateral are in the ratio 1:3:7:9. The measure of the largest angle is
(b) 72°
(c) 81°
(d) none of these
​

Answer 1

Answer:

81°

Step by step explaination:

Let the angles be 1x , 3x , 7x and 9x respectively...

We know,

Sum of angles of a quadrilateral = 180°

1x + 3x + 7x + 9x = 180°

20x = 180°

x = 180/20

x = 9°

Largest angle

= 9x

= 9 * 9

= 81°

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