Question

abcd solve full solution

Answer 1

sum of all angles of a quadrilateral is 360 °

Answer 2

a + b+c+d= 360 ( sum of all angles in quadrilateral)
x+ 2 x + 13 +3 x+10 + x - 6 = 360
7 x +23 - 6 = 360
7 x = 360 - 17
7 x = 343
x = 343 / 7
x = 49 
(2 x + 13) = 2 *49 + 13
                = 111
(3 x + 10) = 3*49 + 10
                = 157
(x - 6) = 49 - 6
           = 43
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