Tolong jawab ya kakyang lain gk ush jawab jawab yang d. aja
Jawaban:
a) diameter = 14 cm
Jari-Jari = 7 cm
b) diameter = 42 cm
Jari-Jari = 21 cm
c) diameter = 40 cm
Jari-Jari = 20 cm
d) diameter = 35 cm
Jari-Jari = 17,5 cm
e) diameter = 100 cm
Jari-Jari = 50 cm
f) diameter = 280 cm
Jari-Jari = 140 cm
Penjelasan dengan langkah-langkah:
a) Keliling = π × d
44 = 22/7 × d
d = 44 × 7/22
d = 308/22
d = 14 cm
r = d : 2
= 14 : 2
= 7 cm
___________________________
b) Keliling = π × d
132 = 22/7 × d
d = 132 × 7/22
d = 924/22
d = 42 cm
r = d : 2
= 42 : 2
= 21 cm
____________________________
c) Keliling = π × d
125,6 = 3,14 × d
d = 125,6 : 3,14
d = 40 cm
r = d : 2
= 40 : 2
= 20 cm
____________________________
d) Keliling = π × d
110 = 22/7 × d
d = 110 × 7/22
d = 770/22
d = 35 cm
r = d : 2
= 35 : 2
= 17,5 cm
____________________________
e) Keliling = π × d
314 = 3,14 × d
d = 314 : 3,14
d = 100 cm
r = d : 2
= 100 : 2
= 50 cm
____________________________
f) Keliling = π × d
880 = 22/7 × d
d = 880 × 7/22
d = 6160/22
d = 280 cm
r = d : 2
= 280 : 2
= 140 cm