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GeoGebra
Regular polygon with strings
Author:
Roman Chijner
Regular polygon with strings: All in one Use sliders, change form and observe
http://www.youtube.com/watch?v=3gOqt6PHj1E
New Resources
Area of a circle
tangente approach
greenhouse 57
Erde breiten und längengrade
Angle of Elevation and Depression
Discover Resources
Angle at the centre = double the angle at the circumference
Aristarchos' sizes
CCSS IP Math II 5.5.1 Example 2
Isosceles Trapezoid Investigation
等腰直角三角形与双垂线-T3F
Discover Topics
Confidence Interval
LCM and GCD
Mathematics
Integers
Correlation
