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Question 1
Forfatter
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
Nye Materialer
The Gardener's Ellipse
Rectangle Construction Template (V2)
Sum of Squares: Proof without Words
Mondrian's Puzzle
apec
Opdag Ressourcer
My First Geogebra Worksheet
rotation
rotation of a figure
Triangle Areas and the Steiner Inellipse
Udforsk emner
Fordelinger
Diagrammer
Vektorer 3D (tredimensionelle)
Enhedscirkel
Konfidensinterval