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perpendicular line through external point
Author:
Caribou Contests
GeoGebra
New Resources
Parallel or Not? (V2)
Piano. Keyboard.
Supplementary Angles
Isosceles Triangle: Quick Construction
Napoleon's Theorem
Discover Resources
Midsegment Investigation
Step10
What's a point?
Bisect an angle
Congruent triangles inside an arbitrary triangle
Discover Topics
Geometry
Parallelogram
Means
Rotation
Cylinder