Question

pelajaran anak SD ini, tolong dibantu ya kakak²​

Answer 1

Verified answer

Penjelasan dengan langkah-langkah:

4. diket: jari²= 12 dm= 1.2 cm

• Luas:
• [tex] = \frac{1}{4} \times \pi \times {r}^{2} \\ = \frac{1}{4} \times \frac{22}{7} \times \frac{12}{10} \\ = \frac{264}{280} \\ = \frac{33}{35} {cm}^{2} [/tex]
• Keliling:
• [tex] = \frac{1}{4} \times \frac{22}{7} \times 2 \times \frac{12}{10} \\ = \frac{1}{2} \times \frac{22}{7} \times \frac{12}{10} \\ = \frac{22}{7} \times \frac{6}{10} \\ = \frac{132}{70} \\ = \frac{66}{35} {cm}[/tex]

5. diket: diameter=20cm

• jari-jari= 10cm
• [tex]l = \frac{2}{3} \times \pi \times {r}^{2} \\ = \frac{2}{3} \times 3.14 \times 10 \times 10 \\ = \frac{2}{3} \times 314 \\ = \frac{628}{3} \\ = 209.33 {cm}^{2} [/tex]

6. diket

• r= 35 cm
• jarak yang ditempuh 3 putaran
• [tex]k = \pi \times 2r \\ = \frac{22}{7} \times 2 \times 35 \\ = 22 \times 2 \times 5 \\ = 220cm [/tex]

Latihan lanjutin sendiri yaaa^_^. semangatt<3