IF TWO LINES INTERSECT EACH OTHER THEN PROVE THAT VERTICAL OPPOSITE ANGLES ARE EQUAL

When two lines intersect four angles are formed

1,2,3,,4

We have to prove that1 =3 or2 =4

1 +2 = 180 (Linear Pair)

2 +3 =180 (Linear Pair)

1 +2 =2 +3 (Both are180)

1 =3 (After cancelling2 from both sides)

Similarly we can prove2 =4