10) 7 21 48 84

• AB = 7
• MK = 21
• P_MKL = 48
• S_MKL = 84
• k = AB/MK = 7/21 = 1/3
• P_ABC = k * P_MKL = (1/3) * 48 = 16
• S_ABC = k² * S_MKL = (1/3)² * 84 = (1/9) * 84 = 84/9 = 28/3 = 9.333...

Ответ: k = 1/3; P_ABC = 16; S_ABC = 9.333...