3D problem
2014-12-20 12:33 am
Given two triangles of different shapes but with one side having the same length. Now, we stick the two sides of the same length as a common side to form a 3D figure, how to determine the angle between the two triangles/planes.
回答 (2)
2014-12-20 7:46 am
✔ 最佳答案
(1)On the common side (i.e. the edge of the 3D shape), Choose an arbitrary point.
(2) On each of the two triangles/planes, draw a line perpendicular to the common side passing through the point chosen in (1).
(3) Measure/Calculate the angle between the two lines drawn in (2). This angle is the angle between the two triangles/planes. This angle is the said to be "the greatest angle" between the two planes.
2014-12-21 5:04 am
Answer 001 is true.
收錄日期: 2021-04-15 17:35:38
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https://hk.answers.yahoo.com/question/index?qid=20141219000051KK00046