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Jawaban:
Lingkaran
Penjelasan dengan langkah-langkah:
BC = 75/360 x 2πr
15 = 5/24 x 2x22/7xr
15 = 5/24 x 44/7 xr
15 = 5/6 x 11/7 xr
15 = 55/42 x r
r = 15/(55/42)
r = 15x(42/55)
r = 3x(42/11)
r = 126/11
r = 11,4545
r = 11,455
r = 11,46
< AOC = 180° - < BOC
= 180° - 75°
= 105°
a.
AC = < AOC/360 x 2πr
= 105/360 x 2x22/7x11,46
= 7/24 x 44/7 x 11,46
= 44/24 x 11,46
= 11/6 x 11,46
= 21,01
= 21 cm
b.Luas juring = BOC = 45 cm²
Luas juring AOC
< pusat/360 x πr²
105/360x22/7x11,46x11,46
7/24 x 22/7x131,3316
24/22 x 131,3316
12/11 x 131,3316
143,27 cm²
Detail Jawaban
Mapel : Matematika
Kelas : 7 / VII SMP
Materi : Lingkaran
Kode Kategorisasi : -
Kata Kunci : Lingkaran
Demikian
Semoga membantu dan bermanfaat!
