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Question 1
Author:
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
New Resources
Silhouettes without gaps and isolated
Silhouettes
רישום חופשי
koch tool
apec
Discover Resources
Oszillating Pendulum and Lissajous-Figures
trans
quiz next prime
สมการเชิงเส้น
الأعداد الكسرية والكسور غير الفعلية والكسور العشرية
Discover Topics
Combinatorics
Root
Coordinates
Derivative
Integers