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yen23022006
GeoGebra
If AB is parallel to DC, angle ABC is equal to angle CDA, and angle BCD is equal to angle DAB, then ABCD is a parallelogram. True
New Resources
Monkey typing Shakespeare's complete works
Art and Rotational Symmetry
Exploring Simple Loci 探究簡單軌跡
Droste effect draft
Rings of circles
Discover Resources
Untitled
Haleigh Gundy 'Couch Potato' Project
test
rhombus
Ex1b. Reflection in the line x = 0
Discover Topics
Cuboid
LCM and GCD
Distributions
Arithmetic Operations
Angles