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GeoGebra
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Parallel and Perpendicular Lines in the Coordinate Plane
Author:
Tim Brzezinski
Note the EXACT SLOPE tool (with blue background).
GeoGebra
Quick (Silent) Demo
New Resources
Perspective in Art
random coprime pairs
Visualizing the Pythagorean Identity with Sine and Cosine
bewijs stelling van Pythagoras
montecarlo circles 5
Discover Resources
Geometry Quiz #4
Initial trigonometry ratio from triangles
Inclined Plane Slider Construct
Nour_measuring seqments and angles
TamGiac2_03.8.2019_Bai1_YT1_h3-2
Discover Topics
Statistical Characteristics
Pythagoras or Pythagorean Theorem
Numbers
Circumcircle or Circumscribed Circle
Rectangle