Question

What is the value of x if ABC is a triangle and D is a point on BC such that AB = DC, ∠ADB = x,∠ABD = 80° and ∠ACD = 20°

Answer 1

Answer:

20°

Step-by-step explanation:

Answer 2

lets calculate value of x

Step-by-step explanation:

Given, AB = DC

           ∠ADC = 20°

            ∠ADB = x

Therefore, ∠DAC = 20° (angle opposite to equal sides)

          Now, In ΔADC,

            ∠DAC + ∠DCA = Exterior ∠ADB

             20° + 20° =    x

              40° = x

  Answer x = 40°