rms its hypothenuse， which proves to be prolongation of that of the first triangle.“
“ah， captain， i understand!“ cried herbert.“as the distance from the stick to the pole is to the distance from the stick to the base of the cliff， so is the height of the pole to the height of the cliff.“
他们利用木杆量出了两段水平距离，木杆在沙滩上的高度是十英尺整。第一段距离是从小棍子到插木杆的地方，相距十五英尺。第二段距离是从小棍子到峭壁底部，相距五百英尺。
15:500＝10:x
500x10＝5000
6000÷15＝333.3
由此得出，花岗石峭壁的高度是三百三十三英尺。
the two horizontal distances were found out by means of the pole， whose length above the sand was exactly ten feet.
the first distance was fifteen feet between the stickand
第66章知识(11/23)