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Supplementary angles
Author:
Elizabeth Raskin
,
Yoong Kheong
Complementary and supplementary angles
GeoGebra
What do you notice? What is always, sometimes or never true about the angles?
New Resources
"Compressed" Astroid as Envelope
Stairs (Optical Illusion)
Slope of a Straight Line: Run and Rise
Drag that Point!
Linear Cross Section Exercise
Discover Resources
Conjecture about area
activity 1.1
圖形的周界1
Pascal's Triangle Exploration
รูปคลี่พีระมิด
Discover Topics
Centroid or Barycenter
Scatter Plot
Constructions
Kite
Linear Programming or Linear Optimization