Question

if any one answer these questions I will mark them as ba​

Answer 1

Answer:

since all angles at a point add up to 360

and x+y=w+z that means that the values for the sum of z+w and x+y are equal

so 360/2 =180

since we know that angles on a straight line add up to 180 then x+y=180 and w+z=180 thus proving that AOB is a straight line

Answer 2

Step by step explanation

is in the attachment....