Angle D= (2x + 7)°
Angle B= (x + 20)°
(2x + 7)° = (x + 20)°
2x - x= 20 - 7
x = 13
Substitute the value of x
Angle B = (x + 20)°
(13 + 20) = 33°
Since angles 1 and 2 are congruent as well as angles ADC and CBA, therefore angles D and B also have the same measurements. (Di ko na po maalala tawag don sorry hehe)
Angle D= (2x + 7)°
(2(13) + 7) = 33°
