Question

Plz help me to do this
No fake answer only right answer other wise i will report them​

Answer 1

a)

a + b + c = 180

x + a = 180 (linear pair)

x = 180 - a

b + c = 180 - a

x = 180 - a = b + c

thus proved that x = b + c

b)

a + z + b = 180 (linear pair)

a = x

b = y

replacing x and y in place of a and b,

x + z + y = 180

thus proved