Question

if angle acd=100 and angle b=60 find angle a

Answer 1

i thought the same thing @Roh but i only have answer choices 60
40
80
160

Answer 2

a)60
b)40
c)80
d)160

Answer 3

i think it will be solved like this : 180-110=70
and then for angle A : 180-(70+60)=50

Answer 4

@Roh but how come it doesnt show on the awnser choices ??

Answer 5

are you sure the question is correct??

Answer 6

yeah thats how the question is written

Answer 7

B = 60
ACD = 180

ACD + ACB = 180
100 + ACB = 180
ACB = 180 - 100
ACB = 80

B + ACB = 60 + 80 = 140

A = 180 - 140 = 40

Answer 8

@Hero i get it now thanks !!!!