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Interior & Exterior Angles of Triangles 三角形內角和及外角
Author:
Alex CHIK
Topic:
Angles
,
Triangles
點擊各角可顯示它們的大小。
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مقاطع مخروطی
G_4.04 Symmetry_2
دوران 90 درجه نقطه
مثلث سرپینسکی
G_4.04 Symmetry_1
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