Question

in a quadrilateral ABCD angle A equal 120 degree angle B = 60 degree and angle C = 90 degree find angle d ​

Answer 1

Answer:

In a quadrilateral

Sum of angles =180

a+b+c+d=360

120+60+90+d=360

270+d=360

d=360-270

d=90

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Answer 2

Answer:

the total is 180

a + b+ c+ d =180

120+ b= 180

b= 180-120=60

120+60+c=180

so you said c is 90

120 + 60 +90= 180

270-180

so the d is = 90