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Tangiad yn berpendicwlar i'r radiws
Author:
Ifor John Jones
New Resources
Rotation of spheres
Morley's Trisector Theorem
G_10.04 Parallel and perpendicular lines_1a
Demo: dashed trace
G_3.01 Triangles and angles_2
Discover Resources
Geo Spreadsheet
UpperandLowerSums
draft 2.3
Triangle Slider
Line from Slope-Intercept Equation
Discover Topics
Means
Symmetry
Similar Triangles
Cone
Geometric Distribution