Diketahui:
Panjang busur = 44 cm
d = 84
π = 22/7
Ditanyakan:
Luas juring
Jawab:
Keliling = πd
panjang busur = xπd
44 cm = x. (22/7).84 cm
44 cm = x. (22. 12) cm
44/(22. 12) = x
(1/6) = x
Luas = πr²
Luas juring = xπr²
= (1/6)(22/7)(84/2)² cm²
= (1/3)(11/7)(42)² cm²
= (11/21)(1764) cm²
= (11)(588) cm²
= 6468 cm²
_________________________________________
DETAIL JAWABAN
Mapel: Matematika
Kelas: 9
Materi: Bab 7 - Lingkaran
Kata kunci: Panjang busur, Lingkaran, Diameter, Luas
Kode Soal: 2
Kode kategorisasi: 9.2.7
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Verified answer
Diketahui:
Panjang busur = 44 cm
d = 84
π = 22/7
Ditanyakan:
Luas juring
Jawab:
Keliling = πd
panjang busur = xπd
44 cm = x. (22/7).84 cm
44 cm = x. (22. 12) cm
44/(22. 12) = x
(1/6) = x
Luas = πr²
Luas juring = xπr²
= (1/6)(22/7)(84/2)² cm²
= (1/3)(11/7)(42)² cm²
= (11/21)(1764) cm²
= (11)(588) cm²
= 6468 cm²
_________________________________________
DETAIL JAWABAN
Mapel: Matematika
Kelas: 9
Materi: Bab 7 - Lingkaran
Kata kunci: Panjang busur, Lingkaran, Diameter, Luas
Kode Soal: 2
Kode kategorisasi: 9.2.7