minta tolong dong caranya (〒﹏〒)
[tex]28)keliling \\ 4 + 13 + 4 + 10 + 8 + (13 - 6) \\ 46 \: cm \: (b) \\ \\ 29). \frac{1}{2} \: luas \: lingkaran \\ \frac{1}{2} \times \pi \times r \times r \\ \frac{1}{2} \times \frac{22}{7} \times 56 \times 56 \\ 4928 \: {cm}^{2} \: (a) [/tex]
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