Benutzer:Barbara

Testuser.

\overline{MI} \cdot{} \overline{IN} = \overline{CI}^2

A : g = h : 2

A = \frac{g \cdot{} h } {2}

(a + b) ^2 = a^2 + 2ab + b^2

(a - b) ^2 = a^2 - 2ab + b^2

(a + b) ^2 - (a - b) ^2 = 4ab

\frac{(a + b) ^2}{4} - \frac{ (a - b) ^2}{4} = ab

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