1
00:00:00,000 --> 00:00:02,516
Two lines intersect.

2
00:00:02,600 --> 00:00:04,444
Angle one.

3
00:00:04,533 --> 00:00:06,353
Angle three.

4
00:00:06,450 --> 00:00:08,246
Angle two.

5
00:00:08,333 --> 00:00:12,001
Angle one plus angle three is one hundred eighty.

6
00:00:13,300 --> 00:00:16,992
Angle two plus angle three is one hundred eighty.

7
00:00:18,283 --> 00:00:20,631
They share angle three.

8
00:00:21,916 --> 00:00:25,872
So angle one equals angle two.