bonsoir
BD² = 84 ² + 13 ²
BD² = 7 225
BD = √ 7 225 = 85 m
AD² = 7225 - 77 ²
AD² = 1 296
AD = √1296 = 36 m
Périmètre = 77 + 13 + 84 + 36 = 210 m
(77 x 36 ) / 2 = 1 386
aire ABD = 1 386 m²
( 13 x 84 ) / 2 = 546
aire BCD = 546 m²
1386+ 546 = 1 932
aire Paul = 1 932 m²
√1932 = 43.95....
côté du terrain de Aicha = 44 m² arrondi unité
P = 44 * 4 = 176 m
conclus
