Question

In parallelogram ABCD,if angle =(3x+30)°andg angle b=(3x-30)°,then find measure of angle A and B

Answer 1

We know that sum of adjacent side of parallelogram is equals to 180°

=>a + b = 180°
=>3x+30+3x-30 = 180°
=>6x = 180°
=>x = 180°/6
=>x = 30

Then,
a. =3*30 +30
=>a = 120°

and
b = 90 - 30
b= 60°.

Answer 2

we know that sum of adjacent angle of a parallelogram is 180.

so,

<A+<B=180

3x+30+3x-30 = 180

6x = 180

x= 30

<A= 3x+30

= 30*3+30

=90+30

=120°

<B = 3x-30

=3*30-30

=90-30

=60°

Hence ,

<A= 120°

<B=60°

Hope it helps!!!!