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1  | 如圖甲乙丙丁為硯 丙戊庚丁甲乙庚戊二正方相等壬子圓池圓距丙戊丙丁丁庚三邊皆五 分法先求得壬子積與丙戊庚丁積相減餘三二四 八甲乙戊庚積亦為五十方寸則有比例 如左 |
| 2 | 一率 共積 |
| 3 | 二率 共長 |
| 4 | 三率 丙戊庚丁殘積三二四八 |
| 5 | 四率 丁心一九 |
| 6 | 求得丁心一九則距 甲乙邊三寸四分強距丙丁邊六寸六分距甲丙乙丁皆二寸五分 |
| 7 | 有杠桿長二十 七尺以人力百斤欲移動千二百五十斤之石試推其倚所當在何處 |
| 8 | 杜法孟 |
| 9 | 答曰距石二 尺內 |
URN: ctp:ws158620
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