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tolong di jawab di kumpulin nanti jam 11.00​

Berikut ini adalah pertanyaan dari aliefkier2010 pada mata pelajaran Matematika untuk jenjang Sekolah Dasar

Tolong di jawab di kumpulin nanti jam 11.00​
tolong di jawab di kumpulin nanti jam 11.00​

Jawaban dan Penjelasan

Berikut ini adalah pilihan jawaban terbaik dari pertanyaan diatas.

Jawaban:

l = \pi \times {r}^{2} = \frac{1}{4} \times \pi \times {d}^{2} \\ k = 2 \times \pi \times r = \pi \times d \\ d = 2 \times r \\ r = d \div 2 \\ \\ 1a1. \: d = 2 \times 7 = 14 \: cm \\ \\ 1a2. \: l = \frac{22}{7} \times {7}^{2} = \frac{22}{7} \times 49 = 154 {cm}^{2} \\ \\ 1a3. \: k = 2 \times \frac{22}{7} \times 7 = 44cm \\ \\ 1b1. \: 616 = \frac{22}{7} \times {r}^{2} \\ = {r}^{2} = \frac{616 \times 7}{22} = 196 \\ r = \sqrt{196} = 14 \: cm \\ \\ 1b2. \: d = 2 \times 14 = 28 \: cm \\ \\ 1b3. \: k = 2 \times \frac{22}{7} \times 14 = 88cm \\ \\ 1c1. \: d = 2 \times 1.4 = 2.8 m \\ \\ 1c2. \: l = \frac{22}{7} \times {1.4}^{2} = \frac{22}{7} \times 1.96 = 6.16 {m}^{2} \\ \\ 1c3. \: k = 2 \times \frac{22}{7} \times 1.4 = 8.8m = 880cm \\ \\ 1d1. \: r = 56 \div 2 = 28 cm \\ \\ 1d2. \: l = \frac{22}{7} \times {28}^{2} = \frac{22}{7} \times 784 = 2.464cm \\ \\ 1d3. \: k = 2 \times \frac{22}{7} \times 28 = 176cm \\ \\ 1e1. \: r = 28 \div 2 = 14 \: cm \\ \\ 1e2. \: l = \frac{22}{7} \times {14}^{2} = \frac{22}{7} \times 196 = 616 {cm}^{2} \\ \\ 1e3. \: k = 2 \times \frac{22}{7} \times 14 = 88cm

2a. \: k = 2 \times \frac{22}{7} \times 14 = 88cm \\ \\ 2b. \: k = 2 \times \frac{22}{7} \times 21 = 132cm \\ \\ 2c. \: k = 2 \times \frac{22}{7} \times 28 = 176cm \\ \\ 2d. \: k = 2 \times \frac{22}{7} \times 49 = 308cm \\ \\ 2e. \: k = 2 \times \frac{22}{7} \times 56 = 352cm

3a. \: l = \frac{22}{7} \times {21}^{2} = \frac{22}{7} \times 441 = 1386 {cm}^{2} \\ \\ 3b. \: l = \frac{22}{7} \times {35}^{2} = \frac{22}{7} \times 1225 = 3.850 {cm}^{2} \\ \\ 3c. \: k = \frac{22}{7} \times {49}^{2} = \frac{22}{7} \times 2401 = 7546 {cm}^{2} \\ \\ 3d. \: k = \frac{22}{7} \times {105}^{2} = \frac{22}{7} \times 11.025 = 34.650 {cm}^{2} \\ \\ 3e. \: k = \frac{22}{7} \times {140}^{2} = \frac{22}{7} \times 19.600 = 61.600 {cm}^{2}

Semoga dengan pertanyaan yang sudah terjawab oleh kriskrisma dapat membantu memudahkan mengerjakan soal, tugas dan PR sekolah kalian.

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Last Update: Wed, 05 Jan 22
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