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HKDSE Core Math Related Topics
HKDSE Core Math Related Topics
Projection onto 4 Centers of Triangles
Projection onto 4 Centers of Triangles
互相垂直的三腳架頂點投影 [5B10]
互相垂直的三腳架頂點投影 [5B10]
What are the special condition(s) in the tetrahedron so that the projection of vertex lies on the 4 special centres of base?
四面體滿足什麼特殊條件，才能使頂點的投影落在底三角形的四心？
Projection of Perpendicular Tripod
Projection of Perpendicular Tripod
互相垂直的三腳架頂點投影 [5B10]
互相垂直的三腳架頂點投影 [5B10]
What is the relationship between the projection of vertex and base triangle?
若三腳互相垂直，探索四面體頂點投影與其底三角形之間的什麼關係
Folding a Circle to a Special Centre of Triangle
Folding a Circle to a Special Centre of Triangle
摺摺摺，摺出三角另一心 [4B11]
摺摺摺，摺出三角另一心 [4B11]
Fold the segments into the circle, what do you observe?
將這些弓形向圓內摺，你觀察到了什麼？
Is the Line Perpendicular to the Plane?
Is the Line Perpendicular to the Plane?
這條直線與平面垂直嗎？ [5B10]
這條直線與平面垂直嗎？ [5B10]
Do we have enough evidence? How much is enough?
我們有足夠的證據嗎？多少才算足夠？
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