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Altitudes in a triangle_ Dana Weiner
Author:
Danaweiner
New Resources
Triangle Angle Theorems
Sum of the Angles in a Triangle
Congruent Complements Theorem
Workspace
Angle Relationships
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Completed Square Form
PreAlgebra
kilidodoscope
ugly
把向量V的長度，投影到x,y,z軸
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Natural Numbers
Rational Numbers
Variance
Line Segment
Circumcircle or Circumscribed Circle