Daniel Mentrard

Geometric puzzles for algebric formulas
Book
Daniel Mentrard
Algebric puzzle for a²-b² (interactive applet)
Activity
Daniel Mentrard
The three squares theorem
Activity
Daniel Mentrard
Perspective conics
Activity
Daniel Mentrard
Algebric puzzle for(a-b)²
Activity
Daniel Mentrard
The eleven nets of the cube
Activity
Daniel Mentrard
Algebric puzzle for (a+b)²
Activity
Daniel Mentrard
Animation about sum of two vectors
Activity
Daniel Mentrard
Area of a triangle (acute or obtuse)
Activity
Daniel Mentrard
Algebric puzzle for (a+b+c)²
Activity
Daniel Mentrard
Puzzle for the unit cube
Activity
Daniel Mentrard
Circle by sliding a square along an ellipse
Activity
Daniel Mentrard
3D puzzle for sum of the square integers: proof without words
Activity
Daniel Mentrard
When a folding gives the 3D illusion
Activity
Daniel Mentrard
3D algebric puzzle:(a+b)^3 (proof without word)
Activity
Daniel Mentrard
Algebric Puzzle:(a-b)^3 (proof without word)
Activity
Daniel Mentrard
Property of a point inside a regular pentagone
Activity
Daniel Mentrard
Pythagoras or AL Kashi : calculus in the triangle
Activity
Daniel Mentrard
Law of cosine : proof without words
Activity
Daniel Mentrard
Polynomial division by (x-a)², it is magic!
Activity
Daniel Mentrard
The sum of the first n cubes
Activity
Daniel Mentrard
Function, variations, derive and slope
Activity
Daniel Mentrard
Visual explanation of the plot of trigonometric functions from the unit circle
Activity
Daniel Mentrard
64 geometric puzzles (a competitor of the tangram)
Activity
Daniel Mentrard

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