sudut DOE
= 180° - 100°
= 80°
Luas juring COD
= ∠COD / ∠ DOE x Luas DOE
= 100°/80° x 40 cm²
= 5/4 x 40 cm²
= 50 cm²
< pusat / 360° x Luas lingkaran
100°/360° x πr^2
10/36 x 22/7 x 7,56^2
49,896 cm^2
-----------
Catatan :
< DOE = 80°
80°/360° x πr^2
8/36 x 22/7 x r^2 = 40 cm^2
176/252 x r^2 = 40
r^2 = 40 / ( 176/252)
r^2 = 40 x ( 252/176)
r^2 = 57,27
r=√57,27
r=7,56 cm
< DOE = 180° - < DOC
Demikian Semoga Membantu dan Bermanfaat!
Detail Jawaban:
Kelas : 8 / VIII SMP
Mata Pelajaran : Matematika
Bab : 7
Kode Kategorisasi : 8.2.7
Kata Kunci : Lingkaran
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Verified answer
sudut DOE
= 180° - 100°
= 80°
Luas juring COD
= ∠COD / ∠ DOE x Luas DOE
= 100°/80° x 40 cm²
= 5/4 x 40 cm²
= 50 cm²
Lingkaran
Luas Juring COD
< pusat / 360° x Luas lingkaran
100°/360° x πr^2
10/36 x 22/7 x 7,56^2
49,896 cm^2
-----------
Catatan :
< DOE = 80°
80°/360° x πr^2
8/36 x 22/7 x r^2 = 40 cm^2
176/252 x r^2 = 40
r^2 = 40 / ( 176/252)
r^2 = 40 x ( 252/176)
r^2 = 57,27
r=√57,27
r=7,56 cm
< DOE = 180° - < DOC
= 180° - 100°
= 80°
Demikian Semoga Membantu dan Bermanfaat!
Detail Jawaban:
Kelas : 8 / VIII SMP
Mata Pelajaran : Matematika
Bab : 7
Kode Kategorisasi : 8.2.7
Kata Kunci : Lingkaran