

I n this page, you will find animations and graphic explanations for the schoolchildren, small drawing sometimes costing more than long speech
Hey , draw me maths.... 

Summing fractions 

Many pupils miss understand the common denominator in the addition (or subtraction) of fraction. I conceived this small graphic demonstration to defuse him with some pencil strokes.
Summing 1/2 and 2 /3
For the identical rendrent (in the same denominator) I cut the first one by the number of strips of the second The first by 3 and the second in 2
We count now 6 identical rectangles in every square: THE COMMON DENOMINATOR, the Divisor We consider now numbers of squares yellow total: 3 in the first one, 4 in the second is a total of 7 Total is 7/6 (1*3)/(2*3) + (2*2)/(3*2) 

Pythagore : animated démontration of b²=c²  a² with topologic squares 

This link allow a full screen display 
If a² + b² = c² then b² = c²  a²
On this simple example (named even topology) a square b ,dividable by 4, is cut in 4 slices of 4 units Surface equal 4x4 forming b² (b=4 , b² = 16)
Those 4 slices form 2 new squares: 1 / The small white square (in the center of the yellow crown) form the square has measuring 3 units and a surface of 3 x 3: a² 2 / The largest square (the outer edge of the yellow courone) shape square c measuring 5 units and an area of 5 x 5: c² C squared is the sum of the yellow courrone: b², and the white square to the a² Center You can reproduce this demo with a square of paper...
Manufacture of an infinite number of rectangles triangles with the "Fermat calculator" 

Animated Remarquables identities 



Tools 

Download Equation simplifier for learning expanded formulaes 
