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The angles of a quadrilateral are in the ratio 3 : 3 : 5 : 7. The largest angle is ______. - Mathematics

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Question

The angles of a quadrilateral are in the ratio 3 : 3 : 5 : 7. The largest angle is ______.

Options

  • 120°

  • 140°

  • 150°

  • 160°

MCQ
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Solution

The angles of a quadrilateral are in the ratio 3 : 3 : 5 : 7. The largest angle is 140°.

Explanation:

Let the angles be 3x, 3x, 5x and 7x.

Their sum is 18x = 360°. 

So, x = 20°.

The largest angle = 7x 

= 7 × 20° 

= 140°

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Chapter 11: Rectilinear Figures - Exercise 11B [Page 233]

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Nootan Mathematics [English] Class 9 ICSE
Chapter 11 Rectilinear Figures
Exercise 11B | Q 1. | Page 233
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