Question

a) in the given figure, find the value of a, b and c

Answer 1

Answer:

a = 20°, b = 130°, c = 50°.

Step-by-step explanation:

In ΔACD,

   ∠CAD + ∠ACD + ∠ADC = 180°

Or, 60° + 70° + c = 180°

Or, c = 180°- 60° - 70°

  ∴ c = 50°     (Ans)

In ∠BDC,

    ∠BDA + ∠ADC = 180°

Or, b + 50° = 180°

Or, b = 180° - 50°

  ∴ b = 130°     (Ans)

In ΔABD,

   ∠BAD + ∠ADB + ∠ABD = 180°

Or, a + 30° + 130° = 180°

Or, a = 180° - 30° - 130°

  ∴ a = 20°      (Ans)

Hope You have understood the process...

By- Md. Mominur Islam Mahim.