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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
Regular Polygons and Equivalent Triangles
The Gardener's Circle
Regular Star Polygons
Area of a Trapezoid
The Gardener's Ellipse
Discover Resources
Start, Perpendicular to point on line
Current in a Lamp
Sudut (radian)
p230e3y4
Discover Topics
Pie Chart or Circle Chart
Arithmetic Mean
LCM and GCD
Percentages
Difference and Slope