tentukan panjang diameter dan jari jari lingkaran. jika diketahui kelilingnya berikut.
a. k=44cm
b. k=132cm
c. k=125, 6cm(π=3, 14)
d. k=110cm
e. k=314cm(π=3, 14)
f. k=880cm
a. k=44cm
b. k=132cm
c. k=125, 6cm(π=3, 14)
d. k=110cm
e. k=314cm(π=3, 14)
f. k=880cm
Penjelasan dengan langkah-langkah:
k= phi×d
=3,14×44
=138,16 cm
A. d = K ÷ π
d = 44 ÷ 22/7
= 44 × 7/22
= 14cm.
r = d ÷ 2
= 14 ÷ 2
= 7cm
B. d = K ÷ π
d = 132 ÷ 22/7
= 132 × 7/22
= 42cm.
r = d ÷ 2
= 42 ÷ 2
= 21cm
C. d = K ÷ π
d = 125,6 ÷ 3,14
= 1256/10 ÷ 314/100
= 1256/10 × 100/314
= 40cm.
r = d ÷ 2
= 40 ÷ 2
= 20cm
D. d = K ÷ π
d = 110 ÷ 22/7
= 110 × 7/22
= 35cm.
r = d ÷ 2
= 35 ÷ 2
= 17,5cm
E. d = K ÷ π
d = 314 ÷ 3,14
= 314 ÷ 314/100
= 314 × 100/314
= 100cm.
r = d ÷ 2
= 100 ÷ 2
= 50cm
F. d = K ÷ π
d = 880 ÷ 22/7
= 880 × 7/22
= 280 cm.
r = d ÷ 2
= 280 ÷ 2
= 140cm
Maaf kalau salah:))