tonglah penjelasan dan jawaban nya

1) L = 4 × 2 / 2 = 4
K = 4 + 2 + √18 = 6 + ✓18

2) L = (11+7) × ✓80 / 2 = 26√5
K = 11+7+8+✓80 = 26 + 4√5