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1  | 不等面立三角 求重心其法若何 |
| 2 | 汪鳳藻 |
| 3 | 法任以一面為底面 求得其重心點自此點至頂角作線必過立三角重心複取一面如法作之 得二線交點即所求准此自底面取重心線四分之一即重心 |
| 4 | 今有正圓球三 角垛共十球球徑一尺求垛頂至平面高若干 |
| 5 | 杜法孟 |
| 6 | 答曰二尺六 寸三分強 |
URN: ctp:ws749461
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