Quadrantal Angles

Quadrantal Angles and Reference Triangles

Move the terminal side of the angle around the circle. What happens when the terminal side of an angle falls on the x or y axis in between each quadrant. What conclusions can you make?

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Classifying Triangles
Fractal Tétraèdre. Dilatation -1/2 centre triangles
Mondrian's Puzzle
Rectangle Construction Template (V2)
Sum of Squares: Proof without Words

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Maclaurin series approximations
Problemish #1
Definition of signed Gradient
Bisect an Angle
Test your eye for color

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Plane Figures or Shapes
Upper and Lower Sum or Riemann Sum
Isosceles Triangles
Probability
LCM and GCD