Question

I) Theorem : The opposite angles formed by two
interesting lines are of equal measure.
Given - line AB and line CD interset at pt O such
that A-O-B, C-O-D
D
A
B.
УС
To Prove : - i) ZAOC = ZBOD
ii) ZBOC = ZAOD
Proof : ZAOC+ D = 180 (angle in linear pair)
D +ZBOD=180( [ )
from 1 and 2
ZAOC+
+ BOD
...ZAOC = ZBOD ....... eliminating ZBOC.
Similarly it can be proved that
ZBOC=
=​

Answer 1

Step-by-step explanation:

I) Theorem : The opposite angles formed by two

interesting lines are of equal measure.

Given - line AB and line CD interset at pt O such

that A-O-B, C-O-D

D

A

B.

УС