Keliling sebuah lingkaran adalah 44 cm hitunglah : a. panjang diameternya b. jari-jarinya
sarahmurni8
A). K =πd 44 = 22/7 × d d = 44×7 / 22 d = 14 cm
b).K= 2πr 44= 2 × 22/7 × r 44= 44/7 × r 44r=44×7 44r =308 r =308 /44 r = 7 cm
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AsruulJawaban bagian A Keliling = 44 πd = 44 322/7d = 44 d = 44/22.7 d = 44 x 7/22 d = 14 cm Jawaban bagian B Cara I Keliling = 44 2πr = 44 2 x 22/7 x r = 44 r = 44/(2 x 22/7) r = 44/2 x 7/22 r = 7 cm Cara II r = 1/2 d r = 1/2 x 14 r = 7 cm
44 = 22/7 × d
d = 44×7 / 22
d = 14 cm
b).K= 2πr
44= 2 × 22/7 × r
44= 44/7 × r
44r=44×7
44r =308
r =308 /44
r = 7 cm
Keliling = 44
πd = 44
322/7d = 44
d = 44/22.7
d = 44 x 7/22
d = 14 cm
Jawaban bagian B
Cara I
Keliling = 44
2πr = 44
2 x 22/7 x r = 44
r = 44/(2 x 22/7)
r = 44/2 x 7/22
r = 7 cm
Cara II
r = 1/2 d
r = 1/2 x 14
r = 7 cm