Polar Triangles

Author:Jeremy Lyle, Steve Phelps

Every spherical triangle (ABC) has an associated polar triangle (DEF) formed by constructing a triangle using the poles of the sides (great circles) of the triangle.

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רישום חופשי
Rolling Triangle
quarter of tetrahedron
koch tool
Function Art 3D - Pawn

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Descartes' Fly
針對學習難點的教學設計 – 分數乘法
การบวกจำนวนเต็มบวกกับจำนวนเต็มลบ
one-third arcs
पाईथागोरस प्रमेय

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Mode
Cube
Geometry
Rhombus
Hypothesis Testing