所屬主題: [初中數學] – Deductive Geometry 演繹幾何

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影片內容: 00:05 – what is it 甚麼是尺規作圖 00:58 – angle bisector 角平分線 02:51 – perpendicular bisector 垂直平分線 05:04 – equilateral triangles 等邊三角形 06:23 – regular hexagon 正六邊形 所屬主題: [初中數學] – Deductive Geometry 演繹幾何

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影片內容: 00:24 – review of theorems 定理重溫 00:44 – illustrative example 1 例子1 02:57 – illustrative example 2 例子2 06:41 – illustrative example 3 例子3 所屬主題: [初中數學] – Deductive Geometry 演繹幾何

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影片內容: 00:13 – sum of interior angles of polygons 多邊形內角和 02:38 – sum of exterior angles of polygons 多邊形外角和 05:17 – illustrative example 1 例子1 06:11 – illustrative example 2 例子2 所屬主題: [初中數學] – Deductive Geometry 演繹幾何

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影片內容: 00:24 – angle sum of triangles 三角形內角和 01:35 – exterior angle of triangles 三角形外角 03:28 – properties related to isosceles triangles 等腰三角形性質 09:45 – properties related to equilateral triangles 等邊三角形性質 12:07 – illustrative example 例子 所屬主題: [初中數學] – Deductive Geometry 演繹幾何

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影片內容: 00:23 – corresponding angles equal 同位角相等 01:54 – alternate angles equal 錯角相等 03:04 – interior angles supplementary 同旁內角互補 05:28 – illustrative example 例子 所屬主題: [初中數學] – Deductive Geometry 演繹幾何

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影片內容: 00:05 – corresponding angles of parallel lines 平行線的同位角 02:05 – alternate angles of parallel lines 平行線的錯角 03:36 – interior angles of parallel lines 平行線的內角 05:07 – illustrative example 例子 所屬主題: [初中數學] – Deductive Geometry 演繹幾何

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影片內容: 00:15 – adjacent angles on a straight line 直線上的鄰角 01:14 – angles at a point 同頂角 01:59 – vertically opposite angles 對頂角 03:27 – illustrative example 例子 所屬主題: [初中數學] – Deductive Geometry 演繹幾何

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所屬主題: [初中數學] – Deductive Geometry 演繹幾何

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影片內容: 01:25 – Euclid and Elements 歐幾里得與幾何原本 所屬主題: [初中數學] – Deductive Geometry 演繹幾何

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