1
00:00:00,530 --> 00:00:04,970
Let's do this question how many altitude's does a triangle have?

2
00:00:05,780 --> 00:00:06,320
OK.

3
00:00:08,480 --> 00:00:10,890
So we have triangle ABC over here.

4
00:00:11,210 --> 00:00:13,360
We have seen that as a triangle has three.

5
00:00:13,370 --> 00:00:13,970
What is this?

6
00:00:14,270 --> 00:00:19,190
You can draw three altitude's two, which are the three older dudes over here.

7
00:00:19,190 --> 00:00:27,500
You can see these are the three older dudes, but let me name it as ID B and C, F eighty B and C of

8
00:00:27,590 --> 00:00:28,640
the three altitude's.

9
00:00:28,640 --> 00:00:30,590
Therefore the answer is option B..

10
00:00:31,010 --> 00:00:32,390
Now what about the next question?

11
00:00:32,570 --> 00:00:37,460
The D triangle always has all the dude outside itself.

12
00:00:37,700 --> 00:00:40,450
OK, it has one older dude outside itself.

13
00:00:40,460 --> 00:00:44,350
What type of triangle will have at least one hour to do it outside itself?

14
00:00:44,570 --> 00:00:46,010
It seems obtuse.

15
00:00:46,010 --> 00:00:47,210
Angle triangle.

16
00:00:47,360 --> 00:00:50,900
You can see this angle over here is an obtuse angle, right?

17
00:00:50,900 --> 00:00:52,610
That is, it's greater than 90 degrees.

18
00:00:52,940 --> 00:00:59,060
Now if you drop and perpendicular to side B, C through it, it will be outside the triangle.

19
00:00:59,060 --> 00:00:59,440
Right.

20
00:00:59,480 --> 00:01:01,370
This it is outside the triangle.

21
00:01:01,610 --> 00:01:04,980
Therefore, the answer to this question is the obtuse angle.

22
00:01:04,980 --> 00:01:08,900
The triangle always has one or the two outside itself.