5th grade
Natural numbers
Basic arithmetic operations
Calculation laws and advantages
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6th grade
Divisibility of numbers
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Angles and angle measures

7th grade
Assignment and rule of three
Calculation of percentage
Rational numbers
Equation and inequation
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8th grade
Function and assignment
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9th grade
The root
Record set of the pythagoras

10th grade
Circle calculation
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Logarithm
Trigonometry
Probability calculus

 

Side-theorem of Euclid's
b² = q · c und a² = p · c

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Assertions

b² = q · c and a² = p · c

 

Evidence

Condition: Both hypotenuse sections p and q make the hypotenuse c.

1. b² = q · c

b² =    h²  + q²                          (Theorem of Pythagoras, h² = p · q – Theorem of   Euclid’s)

b² = p · q + q²                          | q factored out

b² = q · (p + q)                        (p + q = c, displayed shortly before)

b² = q · c

 

2. a² = p · c

a² =    h²  + p²                        (Theorem of Pythagoras, h² = p · q – Theorem of   Euclid’s)

a² = p · q + p²                        | p factored out

a² = p · (q + p)                       (p + q = c, displayed shortly before)

a² = p · c

 

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02/09/07