Salut
1) k = 4,5/3 = 9/6 = 3/2 = 1,5
2) I'J' = IJ × k = 2 × 3/2 = 3 cm
3) KJ = K'J' ÷ k = 6 ÷ 3/2 = 6 × 2/3 = 12/3 = 4 cm
4) angle I'J'K' = angle IJK = 43°
