tlng jwb cpt dgn cara no 1&2

[tex] 1. \frac{1}{2} \times d1 \times d2 \\ = \frac{1}{2} \times 11 \times 8 = 44[/tex]
[tex] \frac{1}{2} \times d1 \times d \\ \frac{1}{2} \times 29 \times 12 \\ = 174[/tex]
maaf kalo salah