Question

plzz solve this question​

Answer 1

Answer:

Step-by-step explanation:

i) ∠DAC + ∠BCD = 180°(sum of opposite angles of a cyclic quadrilateral is 180°)

  105°+∠BCD = 180°

  ∠BCD = 75°

ii) AB and DC are parallel and DA is a transversal then,

 ∠DAC + ∠ADC = 180°(sum of interior angles on the same side of the transversal is 180°)

  105°+∠ADC = 180°

  ∠ADC = 75°

iii) You can either solve using method used in (i) or (ii)

  ∠ABC+∠ADC = 180°(sum of opposite angles of a cyclic quadrilateral is 180°)

  ∠ABC+∠BCD= 180°(sum of interior angles on the same side of the transversal is 180°)

  ∠ABC = 105°