Question

art. B
21. In the figure,
i BAC = 70° and LDAC = 40°, then find BCD
il. BAC = 60° and BCA = 60°, then find ADC​

Answer 1

Answer:

BCD=70  ADC=120

Step-by-step explanation:

As this a cyclic quadrilateral, the sum of opposite angles is 180

Thus BCD= 180-70-40=70

Similarly,

angle ABC=180-60-60=60   (using angle sum proprty in triangle ABC)

So angle ADC=180-60=120

Hope you understood!

Answer 2

Answer:

BCD=70  ADC=120

Step-by-step explanation:

As this a cyclic quadrilateral, the sum of opposite angles is 180

Thus BCD= 180-70-40=70

Similarly,

angle ABC=180-60-60=60   (using angle sum proprty in triangle ABC)

So angle ADC=180-60=120

Hope you understood!