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直角三角尺
Author:
孟宝兴
GeoGebra
New Resources
Poorly Drawn Parallelograms 2
Droste effect
Exploring the Derivative of an Exponential Function
alg2_05_05_01_applet_exp_2_flvs
探究由平行線和截線所成的角
Discover Resources
Ratios in pentagons
Start, Copy an Angle
Vedic square 9... 1-8...
Roman Numerals
Puzzletown
Discover Topics
Median Value
Mathematics
Trigonometry
Cone
Diagrams