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Common Notion 1
Author:
Mathew Purser
Things which equal the same thing also equal one another.
Simple as it sounds, equal things (lines, angles, points, shapes, etc) equal each other.
Tool Practice
Play around with the applet below and convince yourself of CN1
GeoGebra
New Resources
Poorly Drawn Parallelograms 2
Droste effect
Average Rate of Change: Graph a Function (2)
Finding Average Rate of Change of a Function
探究由平行線和截線所成的角
Discover Resources
random_polygon.html
Construct of a Rhombus
Concrete-Pictorial-Abstract and the Teaching for Mastery
Angle Bisector of Pyramid
สามเหลี่ยมพีทาโกรัส
Discover Topics
Optimization Problems
Logarithm
Symmetry
Curve Sketching
Real Numbers