Question

pls tell and of this of understanding quadrilateral chapter pls​

Answer 1

Answer:

80°

d=180-90=90

b=180-90=90

angle BAD 100+90+90=280

360-280=80

Answer 2

Answer:

total sum of angle of ABCD = 360

angle DCB = 100

angle CBA = 180-90      ( the sum of linear pair of angle is = 180)

                  = 90

angle ADC = 180-90

                 = 90

angle BAD =

360 = 100 + 90 + 90 + x  

       = 280 + x

360 - 280 = x

80 = x

measure of angle BAD = 80