9) 12 3 54 90

• k = AB/MK = 12/3 = 4
• P_ABC = 54
• S_ABC = 90
• P_MKL = P_ABC / k = 54 / 4 = 27/2 = 13.5
• S_MKL = S_ABC / k² = 90 / 4² = 90/16 = 45/8 = 5.625

Ответ: k = 4; P_MKL = 13.5; S_MKL = 5.625