mohon dibantu ya(pakai cara)

[tex]l1 = 6 \times {r}^{2} \\ = 6 \times {5}^{2} \\ = 6 \times 25 \\ = 150 \: {cm}^{2} \\ \\ l2 = 2 \times (p \times l + p \times t + l \times t) \\ = 2 \times (9 \times 18 + 9 \times 7 + 18 \times 7) \\ = 2 \times (162 + 63 + 126) \\ = 2 \times 351 \\ = 702 \: {cm}^{2} \\ \\ lg = l1 + l2 \\ = 150 + 702 \\ = 852 \: {cm}^{2} [/tex]