1 00:00:01,040 --> 00:00:09,110 High students in this video, let's discuss classification of triangles, not triangles, can be classified 2 00:00:09,140 --> 00:00:13,910 on the basis of their sides or on the basis of angles. 3 00:00:14,510 --> 00:00:17,810 Let's start with classification on the basis of sites. 4 00:00:18,140 --> 00:00:24,890 There are three types of triangles on the basis of the sides of a triangle that's equilateral triangles, 5 00:00:25,160 --> 00:00:28,190 isosceles triangles and scaling triangles. 6 00:00:28,790 --> 00:00:30,590 Let's start with an equilateral triangle. 7 00:00:31,070 --> 00:00:33,360 This is an example of an equilateral triangle. 8 00:00:33,560 --> 00:00:41,690 You can see that all the sides in an equilateral triangle are equal and every angle is equal and it's 9 00:00:41,690 --> 00:00:43,580 equal to 60 degrees. 10 00:00:43,880 --> 00:00:50,000 So in an equilateral triangle, all the angles are equal and all the sides are equal. 11 00:00:50,510 --> 00:00:50,990 All right. 12 00:00:51,140 --> 00:00:53,650 Let's move on to a in a stranger. 13 00:00:53,960 --> 00:00:55,520 What is an isosceles triangle? 14 00:00:55,970 --> 00:00:59,010 Over here, we have an example of an isosceles triangle. 15 00:00:59,240 --> 00:01:04,340 You can see that two sides are equal in the case of an isolationist triangle. 16 00:01:04,580 --> 00:01:11,090 And the angles opposite the equal sides will also be equal to this angle. 17 00:01:11,090 --> 00:01:13,550 Over here is opposite to this side. 18 00:01:13,700 --> 00:01:20,750 And this angle over here is opposite to decide to the angles opposite two equal sides are also equal 19 00:01:20,930 --> 00:01:22,580 in an isosceles triangle. 20 00:01:23,060 --> 00:01:23,530 All right. 21 00:01:23,930 --> 00:01:25,280 So there are two things. 22 00:01:25,490 --> 00:01:30,860 Two sides are equal and two angles are equal in an isosceles triangle. 23 00:01:31,160 --> 00:01:35,630 Let's move on to the next type of triangle, which is Kaylin Triangle. 24 00:01:35,930 --> 00:01:41,630 In a scaling triangle, you can see that all the three sides are unequal. 25 00:01:41,640 --> 00:01:44,080 So all the three measures will be different. 26 00:01:44,240 --> 00:01:51,560 For example, if this X, this Y and this is said two X is not equal to Y, not equal to that. 27 00:01:51,890 --> 00:01:55,430 This type of a triangle is called a scaling triangle. 28 00:01:56,310 --> 00:02:01,980 So we have covered the classification of triangles on the basis of sites. 29 00:02:02,370 --> 00:02:07,320 Now let's move on to classification on the basis of angles over here. 30 00:02:07,320 --> 00:02:10,020 Also, we have three types of triangles. 31 00:02:10,230 --> 00:02:12,990 That's acute angle triangle, right. 32 00:02:12,990 --> 00:02:16,260 Angle triangle and obtuse angle triangle. 33 00:02:16,740 --> 00:02:18,560 What is an acute angle triangle? 34 00:02:18,900 --> 00:02:19,530 Over here? 35 00:02:19,650 --> 00:02:24,540 We have an example of an acute angle triangle in an acute angle triangle. 36 00:02:24,570 --> 00:02:30,960 All the angles are less than 90 degrees or all the angles are acute angles. 37 00:02:31,500 --> 00:02:39,420 All right, what about the right angle triangle in the right angle triangle one angle is equal to 90 38 00:02:39,420 --> 00:02:39,800 degrees. 39 00:02:40,290 --> 00:02:43,570 You will just have one angle equal to 90 degrees. 40 00:02:44,070 --> 00:02:48,760 And what about an obtuse angle triangle in an obtuse angle triangle? 41 00:02:49,560 --> 00:02:51,320 Let's take an example over here. 42 00:02:51,570 --> 00:02:56,070 You can see that one angle will be an obtuse angle. 43 00:02:59,070 --> 00:03:05,130 So one angle will be an obtuse angle, which means one angle will be greater than 90 degrees. 44 00:03:05,310 --> 00:03:12,030 Now, remember, in an acute angle triangle, all the angles have to be accurate angles in a right angle 45 00:03:12,030 --> 00:03:14,040 triangle and an obtuse angle triangle. 46 00:03:14,310 --> 00:03:19,110 Only one angle need to be right angle or an obtuse angle, respectively.