Question

in fig. if angle dab is equal to 60 degree and angle abd is equal to 50 degree then find angle acb​

Answer 1

Answer:

△ABD, ∠ABD + ∠ADB + ∠DAB = 180° [angle sum property of triangle]

50° + ∠ADB + 60° = 180°

⇒ ∠ADB = 70°

Now, ∠ACB = ∠ABD = 70° [∵ angle in same segment]

Answer 2

Answer:

In∆ADB

Angle A+Angle B+Angle D=180⁰(sum of angles of∆ is equal to 180⁰)

60⁰+50⁰+ angle D=180⁰

110+angle D=180

Angle D=180-110

Angle D=70⁰

Angle D=angle C (angle in same segment)

so angle ACB=70⁰

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