Question

please answer Q5 with explanation
please answer me fast
The person who answer the question I mark him brainlist ​

Answer 1

Answer:

answer is a.angleABC.....

Answer 2

Answer:

a)70° b)110°

Step-by-step explanation:

a)In ΔABD, we have:

∠ABC + ∠ACD + ∠ADC = 180°        ...[Angle addition property of triangle]

⇒∠ABC  + 50° + 60° = 180°

⇒ ∠ABC + 110° = 180°

⇒∠ABC = 180° – 110°

⇒ ∠ABC = 70°

b)In ∠ACB, we have :

∠ACB + ∠ABC = 180°        ...[Angle addition property of triangle]

⇒∠ACB  +70° = 180°

⇒∠ACB = 180° –70°

⇒ ∠ACB =110°