Question

please solve it......​

Answer 1

Answer:

since AB= AC angles opposite to them also will be equal

i.e x = y

x+y+ 4= 180°[sum of inner angles of a triangle is 180]

x+y = 180- 40 = 140

let's substitute y by x since they are equal

x+x = 140

2x = 140

x= 140÷ 2 =70

x = y = 70°

similarly since CD= CB, angleB = z

90+2z = 180

2z= 90

z= 45°