Question

If two lines intersect each other, then prove that a pair of vertically apposite angle
is equal.
1​

Answer 1

Answer:

Step-by-step explanation:

let lines be ab and cd

let them intersect at o

<aoc+<cob=180(linear pairs axiom)

<cob+<bod=180(linear pair axiom)

subtracting them

<aoc-<bod=0

<aoc=<bod

similarly we can prove that <aod=<cob