AD = 6.22
BC = 4.62
(AD)2 = 42 + (AK)2
(AK)^2 = ( AD)^2 - 16
(AK)^2 = ( 6.22)^2 - 16
AK = 4.76
(BC)2 = 42 + (LB)2
(LB)^2 = (BC)^2 - 16
(LB)^2 = (4.62)^2 - 16
LB = 2.31
CD = AB - AK - LB
CD = 10 - 4.76 - 2.31
CD = 2.93
Fläche = ( AB + CD ) / 2 * 4
Fläche = ( 10 + 2.93 ) / 2 * 4
Fläche = 25.86 cm^2
Bei Fehlern oder Fragen wieder melden.
mfg Georg