Question

In the figure, ABC = 40o then find ADC ​

Answer 1

Answer:

triangle ABC = 40°

then ADC =?

Step-by-step explanation:

ABC = 40

ADC = 120

Answer 2

Given : ∠ABC = 40°  

To Find : ∠ADC

Solution:

A , B , C & D are all points on circle

Hence ABCD is a cyclic Quadrilateral

in a cyclic Quadrilateral sum of opposites angles = 180°

=> ∠ABC + ∠ADC = 180°

∠ABC = 40°  

=> 40°   + ∠ADC = 180°

=> ∠ADC = 140°

∠ADC = 140°

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