More about 3-D Figures 續立體圖形

Alex CHIK, Apr 25, 2015

[b]GeoGebra 互動數學教室[/b] [url]http://www.geogebra.hk[/url]


  • 1. Line Perpendicular to Plane 垂直於平面的直線
  • 2. Angle between a Line and a Plane 投影與線面角
  • 3. Quiz on Projection of a Line Segment on a Plane 投影：測驗
  • 4. Quiz on Angle between a Line and a Plane 線面角：測驗
  • 5. Angle between Two Planes 面面角

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Line Perpendicular to Plane 垂直於平面的直線

Move point A such that AB is perpendicular to the plane. Then move point D. Does angle ABD change?[br]移動A點使AB垂直於平面。然後移動D點。角ABD有變化嗎?
GeoGebra 互動數學教室 [url]http://www.geogebra.hk[/url]
– Alex CHIK

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