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Altitudes of a Triangle and the Orthocenter
Author:
Donald York
Topic:
Orthocenter
GeoGebra
New Resources
"Compressed" Astroid as Envelope
Spinning cube - Belt Trick
Slope of a Straight Line: Run and Rise
Stairs (Optical Illusion)
Angles and Intersecting Lines: Quick Investigation
Discover Resources
CCSS IP Math I 2.6.3 Example 3
Cartesian Eq. of a Vector
Equilateral Triangle Construction
Polar Graph Calculator (for Lengths) 3.1
treasure 1
Discover Topics
Step Functions
Set Theory
Triangles
Histogram
Surface