tolong dibantu ya kaka kaka

NO/KL = MO/ML
5 cm/7 cm = 6 cm/6 cm+a
Dikali silang, sehingga menjadi:
5 cm x (6 cm+a) = 7 cm x 6 cm
30 cm^2 + 5a cm = 42 cm^2
5a cm = 42 cm^2 - 30 cm^2
5a cm = 12 cm^2
a = 12 cm^2/5 cm
a = 2,4 cm
Semoga membantu, sorry kalo salah