Jawaban:
3. B. 314 cm²
4. C. Tali Busur
5. C. 1256 cm²
Penjelasan dengan langkah-langkah:
Luas lingkaran = phi.r²
3. Diameter = 20 cm, dicari r atau jari-jarinya
r = d/2 = 20/2 = 10
L = phi.r²
= 3,14×10²
= 3,14×100
= 314 ( B. 314 cm²)
5. r = 20
phi = 3,14
= 3,14×20²
= 3,14×400
= 1.256 (C. 1256 cm²)
Semoga membantu :))
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Jawaban:
3. B. 314 cm²
4. C. Tali Busur
5. C. 1256 cm²
Penjelasan dengan langkah-langkah:
Luas lingkaran = phi.r²
3. Diameter = 20 cm, dicari r atau jari-jarinya
r = d/2 = 20/2 = 10
L = phi.r²
= 3,14×10²
= 3,14×100
= 314 ( B. 314 cm²)
5. r = 20
phi = 3,14
L = phi.r²
= 3,14×20²
= 3,14×400
= 1.256 (C. 1256 cm²)
Semoga membantu :))