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1  | 如圖戊為圓心甲乙 為大股作丁戊線與醜戊正交戊丁丙平句股甲丁壬為邊句股甲丁為邊 弦丙丁為平句丙戊平股與丙乙等則丁乙即平句股較以甲乙減甲丁得 丁乙即平較故大股減邊弦等於平句股較也 |
| 2 | 大股內減平句 股較等於邊股平句和試作圖解 |
| 3 | 懿善 |
URN: ctp:ws414398
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