Question

plz answer a question ​

Answer 1

Answer:

EASY!

Step-by-step explanation:

Take angle APC as x and angle APB as y

Clearly BC is a straight line then

x + y = 180 degrees      

Now, angle APB = angle ABP = x

and

angle ADC = angle APC = y

angle ABP + angle ADC = x + y = 180 degrees

thus, opposite angles are equal to 180 degrees

and In a cyclic QUAD opposite angles are supplementary

thus

ABCD is a cyclic QUAD