Question

prove experimentally that if two straight lines intersect each other the pair of vertically opposite angles are equal​

Answer 1

ANSWER

Let AB & CD be two lines

∠1+∠4=180

∘

(CD is a st. line)

∠4+∠3=180

∘

(AB is a st. line)

∠1+∠4=∠4+∠3

∠1=∠3 similarly ∠2=∠4

thus proved

Answer 2

Step-by-step explanation:

Let AB & CD be two lines

∠1+∠4=180∘ (CD is a st. line)

∠4+∠3=180∘ (AB is a st. line)

∠1+∠4=∠4+∠3

∠1=∠3 similarly ∠2=∠4

thus proved