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The angles of a triangle always sum to 180 degrees.
Author:
Andrea Siwik
GeoGebra
New Resources
Proving Triangles Similar: Multistep Transformations
apec
Right Triangle Trig Ratios: sin, cos, tan
Proving Triangles Similar by Dilation
seo tool
Discover Resources
Reflection of a point about O(0,0)
Factorising
soccer field teacher 1.1
Equilatero
Discover Topics
Boxplot
Dilation
Reflection
Special Points
Geometry