Question

nas figuras as retas R S e t são paralelas calcule a e b b e c = 3D = 3 e R = 4

Answer 1

ab) AB / BC  = DE / EF
AB / 3  = 3/4
4AB = 9
AB = 9/4  

b)  AB / AC = FE / FE+ ED
AB / 13,5 = 4 / 4 + 5
AB / 13,5 = 4 / 9
9AB = 13,5 * 4
9AB = 54
AB = 54/9 = 6