Bonjour
OB² = 6² + 8² = 36 + 64 = 100
OB = √100 = 10 cm
OC² = 26² - 10 ² = 676 - 100 = 576
OC = √576 = 24 cm
OD² = 25 ² - 24 ² = 49
OD = √49 = 7 cm
aire BCD = ( 17 x 24 ) /2 = 204 cm ²
