1 00:00:08,100 --> 00:00:13,016 All four sides are equal. This is a square. 2 00:00:13,400 --> 00:00:16,036 Draw a line of symmetry. 3 00:00:20,833 --> 00:00:27,429 Fold along the line of symmetry. The two triangles match perfectly. 4 00:00:32,016 --> 00:00:35,708 Angle one equals angle two. 5 00:00:38,100 --> 00:00:40,712 Now, a triangle. 6 00:00:46,100 --> 00:00:51,904 All three sides are b. This is an isosceles triangle. 7 00:00:52,300 --> 00:00:54,936 Draw a line of symmetry. 8 00:01:00,233 --> 00:01:06,517 Fold along the line of symmetry. The two halves match perfectly. 9 00:01:11,116 --> 00:01:14,808 Angle one equals angle two. 10 00:01:19,200 --> 00:01:20,660 One 11 00:01:21,050 --> 00:01:22,510 Two 12 00:01:22,900 --> 00:01:24,552 Three 13 00:01:26,050 --> 00:01:27,510 One 14 00:01:27,900 --> 00:01:29,360 Two 15 00:01:29,750 --> 00:01:31,402 Three 16 00:01:33,000 --> 00:01:34,460 One 17 00:01:34,850 --> 00:01:36,310 Two 18 00:01:36,700 --> 00:01:38,352 Three 19 00:01:39,850 --> 00:01:43,350 All three axes go through a vertex. 20 00:01:44,350 --> 00:01:46,458 None do not. 21 00:01:50,050 --> 00:01:51,510 One 22 00:01:51,900 --> 00:01:53,360 Two 23 00:01:53,750 --> 00:01:55,402 Three 24 00:01:55,800 --> 00:01:57,452 Four 25 00:01:58,950 --> 00:02:00,410 One 26 00:02:00,800 --> 00:02:02,260 Two 27 00:02:02,650 --> 00:02:04,302 Three 28 00:02:04,700 --> 00:02:06,352 Four 29 00:02:07,950 --> 00:02:09,410 One 30 00:02:09,800 --> 00:02:11,260 Two 31 00:02:11,650 --> 00:02:13,302 Three 32 00:02:13,700 --> 00:02:15,352 Four 33 00:02:16,850 --> 00:02:20,134 Two axes go through a vertex. 34 00:02:21,133 --> 00:02:23,289 Two do not. 35 00:02:27,483 --> 00:02:28,943 One 36 00:02:29,333 --> 00:02:30,793 Two 37 00:02:31,183 --> 00:02:32,835 Three 38 00:02:33,233 --> 00:02:34,885 Four 39 00:02:35,283 --> 00:02:36,935 Five 40 00:02:38,433 --> 00:02:39,893 One 41 00:02:40,283 --> 00:02:41,743 Two 42 00:02:42,133 --> 00:02:43,785 Three 43 00:02:44,183 --> 00:02:45,835 Four 44 00:02:46,233 --> 00:02:47,885 Five 45 00:02:49,483 --> 00:02:50,943 One 46 00:02:51,333 --> 00:02:52,793 Two 47 00:02:53,183 --> 00:02:54,835 Three 48 00:02:55,233 --> 00:02:56,885 Four 49 00:02:57,283 --> 00:02:58,935 Five 50 00:03:00,433 --> 00:03:03,885 All five axes go through a vertex. 51 00:03:04,883 --> 00:03:06,991 None do not. 52 00:03:10,583 --> 00:03:12,043 One 53 00:03:12,433 --> 00:03:13,893 Two 54 00:03:14,283 --> 00:03:15,935 Three 55 00:03:16,333 --> 00:03:17,985 Four 56 00:03:18,383 --> 00:03:20,035 Five 57 00:03:20,433 --> 00:03:22,181 Six 58 00:03:23,666 --> 00:03:25,126 One 59 00:03:25,516 --> 00:03:26,976 Two 60 00:03:27,366 --> 00:03:29,018 Three 61 00:03:29,416 --> 00:03:31,068 Four 62 00:03:31,466 --> 00:03:33,118 Five 63 00:03:33,516 --> 00:03:35,264 Six 64 00:03:36,850 --> 00:03:38,310 One 65 00:03:38,700 --> 00:03:40,160 Two 66 00:03:40,550 --> 00:03:42,202 Three 67 00:03:42,600 --> 00:03:44,252 Four 68 00:03:44,650 --> 00:03:46,302 Five 69 00:03:46,700 --> 00:03:48,448 Six 70 00:03:49,933 --> 00:03:53,313 Three axes go through a vertex. 71 00:03:54,300 --> 00:03:56,504 Three do not. 72 00:04:00,700 --> 00:04:02,160 One 73 00:04:02,550 --> 00:04:04,010 Two 74 00:04:04,400 --> 00:04:06,052 Three 75 00:04:06,450 --> 00:04:08,102 Four 76 00:04:09,600 --> 00:04:11,060 One 77 00:04:11,450 --> 00:04:12,910 Two 78 00:04:13,300 --> 00:04:14,952 Three 79 00:04:15,350 --> 00:04:17,002 Four 80 00:04:18,400 --> 00:04:21,156 No axes of symmetry. 81 00:04:26,550 --> 00:04:28,010 One 82 00:04:28,400 --> 00:04:29,860 Two 83 00:04:30,250 --> 00:04:31,902 Three 84 00:04:32,300 --> 00:04:33,952 Four 85 00:04:35,450 --> 00:04:36,910 One 86 00:04:37,300 --> 00:04:38,760 Two 87 00:04:39,150 --> 00:04:40,802 Three 88 00:04:41,200 --> 00:04:42,852 Four 89 00:04:44,250 --> 00:04:47,006 No axes of symmetry.