a). Panjang garis pelukis
[tex] \sqrt{ {r}^{2} + {t}^{2} } \\ \sqrt{ {12}^{2} + {16}^{2} } \\ \sqrt{144 + 256} \\ \sqrt{400} \\ 20 \: cm \\ \\ b). Luas \: selimut \\ \pi \times r \times s \\ 3,14 \times 12 \: cm \times 20 \: cm \\ 753,6 \: {cm}^{2} [/tex]
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a). Panjang garis pelukis
[tex] \sqrt{ {r}^{2} + {t}^{2} } \\ \sqrt{ {12}^{2} + {16}^{2} } \\ \sqrt{144 + 256} \\ \sqrt{400} \\ 20 \: cm \\ \\ b). Luas \: selimut \\ \pi \times r \times s \\ 3,14 \times 12 \: cm \times 20 \: cm \\ 753,6 \: {cm}^{2} [/tex]