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Question 1
Autore:
Arthur Lee
圖中有一組藍色的線。移動紅點可改變其中一條線的角度。圖中可以出現最多幾多對互相垂直的藍線？
GeoGebra
答案：四對
Nuove risorse
Slope Between 2 Points (Phase 2)
Regular Star Polygons
Focus and Directrix
z`]]
Parallelogram Anatomy
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House Problem 1
Quadratics in standard form
The Converse of the Pythagorean Theorem
Fractions / breuken
สามเหลี่ยมพีทาโกรัส
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Simmetrie
Numeri
Ortocentro
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