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Chapter 8 exercise 8.1 question no …

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Chapter 8 exercise 8.1 question no 1 The angles of quadrilateral are in the ratio 3:5:9:13. Find the all angles of the quadrilateral

Posted by Priyansh Yadav 5 years ago

CBSE > Class 09 > Mathematics

3 answers

Devil Ninja Gurpanish 5 years ago

Let the four angles of the quadrilateral be 3x, 5x, 9x and 13x 3x+5x+9x+13x=360 [sum of all angles of the quadrilateral is 360° ] 30x=360 ∘ x=12 Hence, the angles of the quadrilateral are 3×12 ° =36 ° 5×12 ° =60 ° ,9×12 =108° and13×12° =156°

Himangshu Das 5 years ago

Let the angles be 3x, 5x, 9x and 13x => 3x+5x+9x+13x=360∘ [the sum of all angles of a quadrilateral is 360∘] =>30x=360∘ => x=360°÷30 => x=12° Thus, the angles of the quadrilateral are 3×12∘=36∘ 5×12∘=60∘ 9×12∘=108∘ 13×12∘=156∘

Yogita Ingle 5 years ago

Let the four angles of the quadrilateral be 3x, 5x, 9x and 13x
3x+5x+9x+13x=360^∘ [sum of all angles of the quadrilateral is 360^∘]
30x=360^∘
x=12^∘
Hence, the angles of the quadrilateral are 3×12^∘=36^∘, 5×12^∘=60^∘,9×12^∘=108^∘and13×12^∘=156^∘

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