[Script Info]
Title: 
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:00.27,0:00:02.47,Default,,0000,0000,0000,,다음 두 점 사이의\N거리는 얼마일까요?
Dialogue: 0,0:00:05.16,0:00:08.38,Default,,0000,0000,0000,,동영상을 잠시 멈추고\N직접 구해 보세요
Dialogue: 0,0:00:08.38,0:00:10.43,Default,,0000,0000,0000,,이 문제를 푸는 방법은\N여러 가지예요
Dialogue: 0,0:00:10.43,0:00:12.92,Default,,0000,0000,0000,,여기서는 이 두 점을 잇는\N직선을 빗변으로 두는
Dialogue: 0,0:00:12.92,0:00:15.80,Default,,0000,0000,0000,,직각삼각형을\N그려 볼 거예요
Dialogue: 0,0:00:15.80,0:00:18.88,Default,,0000,0000,0000,,
Dialogue: 0,0:00:18.88,0:00:21.46,Default,,0000,0000,0000,,그리고 피타고라스 정리를\N이용해 봅시다
Dialogue: 0,0:00:21.46,0:00:24.22,Default,,0000,0000,0000,,한번 해 볼까요?
Dialogue: 0,0:00:24.22,0:00:27.14,Default,,0000,0000,0000,,먼저 직각삼각형을\N그려 볼게요
Dialogue: 0,0:00:28.25,0:00:31.26,Default,,0000,0000,0000,,이 변이\N직각삼각형의 세로이고
Dialogue: 0,0:00:31.26,0:00:34.85,Default,,0000,0000,0000,,이 변은 직각삼각형의\N가로입니다
Dialogue: 0,0:00:35.72,0:00:37.77,Default,,0000,0000,0000,,그리고 빗변은\N이 두 점을 잇겠죠
Dialogue: 0,0:00:37.77,0:00:40.44,Default,,0000,0000,0000,,도구를 이용해서\N두 점을 이어 볼게요
Dialogue: 0,0:00:40.44,0:00:44.02,Default,,0000,0000,0000,,
Dialogue: 0,0:00:45.03,0:00:47.19,Default,,0000,0000,0000,,주황색으로\N표시하겠습니다
Dialogue: 0,0:00:47.19,0:00:49.31,Default,,0000,0000,0000,,완성됐습니다
Dialogue: 0,0:00:49.31,0:00:50.48,Default,,0000,0000,0000,,
Dialogue: 0,0:00:50.48,0:00:53.30,Default,,0000,0000,0000,,이렇게 두 점을 잇는\N직선을 빗변으로 두는
Dialogue: 0,0:00:53.30,0:00:57.36,Default,,0000,0000,0000,,직각삼각형을\N완성했습니다
Dialogue: 0,0:00:57.36,0:00:58.86,Default,,0000,0000,0000,,이 방법은\N왜 유용할까요?
Dialogue: 0,0:00:58.86,0:01:00.80,Default,,0000,0000,0000,,동영상을 잠시 멈추고\N주황색 직선의 길이
Dialogue: 0,0:01:00.80,0:01:03.54,Default,,0000,0000,0000,,즉, 두 점 사이의 거리를\N구할 수 있나요?
Dialogue: 0,0:01:03.54,0:01:06.27,Default,,0000,0000,0000,,
Dialogue: 0,0:01:06.27,0:01:09.40,Default,,0000,0000,0000,,빨간 직선의\N길이는 얼마일까요?
Dialogue: 0,0:01:09.40,0:01:11.57,Default,,0000,0000,0000,,모눈종이를 보면\N2라는걸 알 수 있죠?
Dialogue: 0,0:01:11.57,0:01:13.35,Default,,0000,0000,0000,,
Dialogue: 0,0:01:13.35,0:01:15.96,Default,,0000,0000,0000,,2칸만큼\N떨어져 있습니다
Dialogue: 0,0:01:15.96,0:01:17.39,Default,,0000,0000,0000,,이를 좌표를 이용해\N생각할 수도 있어요
Dialogue: 0,0:01:17.39,0:01:19.62,Default,,0000,0000,0000,,이 점의 좌표는\N(-5, 8)이죠
Dialogue: 0,0:01:19.62,0:01:22.04,Default,,0000,0000,0000,,
Dialogue: 0,0:01:23.02,0:01:25.75,Default,,0000,0000,0000,,
Dialogue: 0,0:01:25.75,0:01:29.33,Default,,0000,0000,0000,,이 점의 좌표는\Nx가 4이고 y가 6입니다
Dialogue: 0,0:01:30.34,0:01:33.82,Default,,0000,0000,0000,,(4, 6)
Dialogue: 0,0:01:33.82,0:01:37.99,Default,,0000,0000,0000,,그러므로 이 점은\N(4, 6)과 y좌표가 같으며
Dialogue: 0,0:01:39.49,0:01:41.41,Default,,0000,0000,0000,,x좌표는 (-5, 8)과 같으므로
Dialogue: 0,0:01:41.41,0:01:43.13,Default,,0000,0000,0000,,
Dialogue: 0,0:01:43.13,0:01:45.56,Default,,0000,0000,0000,,이 점의 좌표는\N(-5, 6)이 됩니다
Dialogue: 0,0:01:45.56,0:01:48.36,Default,,0000,0000,0000,,왼쪽의 두 점을 보면\Ny축 방향으로만 이동했어요
Dialogue: 0,0:01:48.36,0:01:50.70,Default,,0000,0000,0000,,2만큼 이동했습니다
Dialogue: 0,0:01:50.70,0:01:53.61,Default,,0000,0000,0000,,파란색 직선의\N길이는 얼마일까요?
Dialogue: 0,0:01:53.61,0:01:55.88,Default,,0000,0000,0000,,칸을 세어 보면\N1, 2, 3, 4, 5, 6, 7, 8, 9칸이네요
Dialogue: 0,0:01:55.88,0:01:59.17,Default,,0000,0000,0000,,
Dialogue: 0,0:01:59.17,0:02:01.75,Default,,0000,0000,0000,,그러므로 이 길이는 9입니다
Dialogue: 0,0:02:01.75,0:02:04.58,Default,,0000,0000,0000,,또는 x값의 증가량을\N생각해 볼 수도 있어요
Dialogue: 0,0:02:04.58,0:02:06.19,Default,,0000,0000,0000,,왼쪽 점의 x는 -5이고
Dialogue: 0,0:02:06.19,0:02:09.08,Default,,0000,0000,0000,,오른쪽 점의 x는 4입니다
Dialogue: 0,0:02:09.08,0:02:11.48,Default,,0000,0000,0000,,그러므로 총\N9만큼 증가했습니다
Dialogue: 0,0:02:11.48,0:02:13.62,Default,,0000,0000,0000,,이제 피타고라스 정리를\N이용할 수 있습니다
Dialogue: 0,0:02:13.62,0:02:15.60,Default,,0000,0000,0000,,
Dialogue: 0,0:02:15.60,0:02:19.77,Default,,0000,0000,0000,,이 빗변을 c라고 둘게요
Dialogue: 0,0:02:21.94,0:02:25.29,Default,,0000,0000,0000,,a² + b² = c²이죠?
Dialogue: 0,0:02:25.29,0:02:26.83,Default,,0000,0000,0000,,옆에 써 볼게요
Dialogue: 0,0:02:26.83,0:02:28.100,Default,,0000,0000,0000,,각 변의 색과\N같은 색으로 써 볼게요
Dialogue: 0,0:02:28.100,0:02:33.08,Default,,0000,0000,0000,,2² + 9² 은 \N빗변의 제곱과 같으므로
Dialogue: 0,0:02:34.88,0:02:37.93,Default,,0000,0000,0000,,
Dialogue: 0,0:02:37.93,0:02:40.49,Default,,0000,0000,0000,,2² + 9² = c²입니다
Dialogue: 0,0:02:40.49,0:02:41.64,Default,,0000,0000,0000,,이것이 우리가\N구하려는 길이죠
Dialogue: 0,0:02:41.64,0:02:43.40,Default,,0000,0000,0000,,
Dialogue: 0,0:02:43.40,0:02:47.57,Default,,0000,0000,0000,,2²은 4이고\N9²은 81이죠
Dialogue: 0,0:02:50.17,0:02:53.90,Default,,0000,0000,0000,,4 + 81 = c²입니다
Dialogue: 0,0:02:53.90,0:02:56.57,Default,,0000,0000,0000,,따라서 c² = 85죠
Dialogue: 0,0:02:57.43,0:02:59.85,Default,,0000,0000,0000,,
Dialogue: 0,0:03:00.74,0:03:04.42,Default,,0000,0000,0000,,또는 c = √85입니다
Dialogue: 0,0:03:04.42,0:03:06.92,Default,,0000,0000,0000,,이를 좀 더\N간단하게 만들 수 있을까요?
Dialogue: 0,0:03:06.92,0:03:07.93,Default,,0000,0000,0000,,
Dialogue: 0,0:03:07.93,0:03:11.06,Default,,0000,0000,0000,,5는 85에\N몇 번 들어갈까요?
Dialogue: 0,0:03:11.06,0:03:14.15,Default,,0000,0000,0000,,17번 들어가겠네요
Dialogue: 0,0:03:16.09,0:03:17.86,Default,,0000,0000,0000,,5와 17은 모두\N완전제곱수가 아니네요
Dialogue: 0,0:03:17.86,0:03:19.100,Default,,0000,0000,0000,,50 + 35니까요
Dialogue: 0,0:03:19.100,0:03:22.28,Default,,0000,0000,0000,,이 형태가 가장\N간단하게 쓴 형태입니다
Dialogue: 0,0:03:22.28,0:03:23.96,Default,,0000,0000,0000,,이를 소수로\N나타내고 싶다면
Dialogue: 0,0:03:23.96,0:03:26.32,Default,,0000,0000,0000,,계산기를 이용해\N나타낼 수도 있습니다
Dialogue: 0,0:03:26.32,0:03:29.10,Default,,0000,0000,0000,,
Dialogue: 0,0:03:29.10,0:03:31.81,Default,,0000,0000,0000,,여기서는 이 직선의 길이를\N여기까지만 나타낼게요
Dialogue: 0,0:03:31.81,0:03:33.36,Default,,0000,0000,0000,,직각삼각형의\N빗변의 길이를 구했지만
Dialogue: 0,0:03:33.36,0:03:35.06,Default,,0000,0000,0000,,이 문제에서 중요한 것은\N두 점 사이의 거리입니다
Dialogue: 0,0:03:35.06,0:03:37.89,Default,,0000,0000,0000,,