bonjour
a) AB = 6.5 + 3.5 = 10
b )
1 ) AB = a + 4
2 ) AB = a + b
3) AB = a - b
4 ) AB = a + b + c
5 ) AB = 2 ( a + b ) = 2 a + 2 b
c ) L = a + b + 2 c
a = 5 cm , b = 3 cm et L = 15 cm
2 c = 15 - a - b
2 c = 15 - 5 - 3
2 c = 15 - 8 = 7
c = 7/2 = 3.5 cm
17 + 11 + 2 *3.5 = 28 + 7 = 35 cm
