1.

the quadrilateral as they are if angle S is equal to 120 degree and Angle t ratio angle A ratio angle R is equal to 5 ratio 3 ratio ratio 7

Answer»

Atq, sum of all angles of quadrulateral is 360
But we ALREADY have 1 angle known i,e S = 120

therefore, 360 - 120 = 240

that means, other will be CALCULATED accoording to total 240,
T : A : R
5 : 3 : 7

and, 5a + 3A + 7a = 240
15 a = 240
= 240/15 = 16

now put value of a in ratios
5a = 5 x 16 = 80°
3a = 3 x 16 = 48°
7a = 7 x 16 = 112°
so angles T , A and R are 80°, 48° and 112°


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