1
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Let's do this question, which one of the following is not?

2
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A criterion for congruency of two triangles.

3
00:00:09,040 --> 00:00:12,460
We have seen that just now, what are the four valid criteria?

4
00:00:12,820 --> 00:00:14,590
We have Essence's S.

5
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S Esy and oddities.

6
00:00:17,440 --> 00:00:20,110
And remember, is it also has A.

7
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S, which is one and the same right now.

8
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What is the correct answer?

9
00:00:24,070 --> 00:00:26,800
You have option B, that is S.

10
00:00:26,800 --> 00:00:31,960
S E is not a valid criteria and we have seen why that is so right.

11
00:00:32,290 --> 00:00:35,170
We can construct two triangles that that.

12
00:00:36,170 --> 00:00:42,560
Two sites and an angle, which is not the included angle, are equal to the two sites and an angle of

13
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a given triangle, right.

14
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Therefore, SASE is not a valid criteria to establish congruency of two triangles.

15
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All right.

16
00:00:50,870 --> 00:00:51,980
Let's do one more question.

17
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By which of the following criterion two triangles cannot be proved to be congruent?

18
00:00:58,550 --> 00:01:04,790
Now, again, which one of these is wrong and says this definitely is a valid criteria it says is a

19
00:01:04,790 --> 00:01:08,060
valid criteria and ESEA is a valid criteria.

20
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Now, imagine two equilateral triangles, right?

21
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You can see that this one is a smaller one.

22
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This one is a bigger one.

23
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But all the angles are equal.

24
00:01:16,820 --> 00:01:18,770
So I can say that these two angles are equal.

25
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I can say that these two angles are equal and I can say that these two angles are equal.

26
00:01:24,680 --> 00:01:30,050
But we know that these two triangles are not congruent because if you superimpose this on top of this,

27
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it will not cover it.

28
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Exactly.

29
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Therefore, it is not a valid criteria to check congruency of two triangles.
