1.

dUU UI WC SUL ZILU.If in a gm ABCD ZA-(2x +45) and ZC = (3x - 15), find all the angles.SECTION -C

Answer»

as we know the sum of adjacent sides of parallelogram is 180

< A + < B= 180

= 2x + 35 + 3x -5= 180

= 5x + 30= 180

= 5x= 180-30

= 5x= 150

= x= 150/5

= x= 30

<A = 2x + 35 =2*30 + 35= 60+35 =95°

< B= 3x - 5= 3*30 -5 = 85°

as we know opposite angles f paralellograms are equal.

then

<A =<C= 95°

<B = <D= 85°


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