Keliling dan Luas Lingkaran
Authored by THIA AYU ANGGRAINI
Mathematics
6th Grade
Used 1+ times
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10 questions
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1.
MULTIPLE CHOICE QUESTION
5 mins • 10 pts
Sebuah lingkaran yang memiliki jari-jari 10 cm, luasnya adalah ....
3,14 cm2
31,4 cm2
314 cm2
3.140 cm2
Answer explanation
L = π x r2
L = 3,14 x 10 x 10
L = 3,14 x 100
L = 314 cm2
2.
MULTIPLE CHOICE QUESTION
5 mins • 10 pts
Luas lingkaran di samping adalah ....
616 cm2
2.464 cm2
308 cm2
2.154 cm2
Answer explanation
L = π x r2
L = 22/7 x 14 x 14
L = 22 x 2 x 14
L = 44 x 14
L = 616 cm2
3.
MULTIPLE CHOICE QUESTION
1 min • 10 pts
Hubungan antara jari-jari lingkaran dan diameter ditunjukkan oleh persamaan ...
d = 3 x r
d = 2 x r
d = ½ x r
d = ¼ r
Answer explanation
Diameter adalah dua kali lipat dari panjang jari-jari, maka jari-jari sama dengan setengah dari diameter. sehingga diameter = 2 x jari-jari
4.
MULTIPLE CHOICE QUESTION
5 mins • 10 pts
Keliling lingkaran yang diameternya 21 cm adalah ...
33 cm
42 cm
66 cm
132 cm
Answer explanation
K = π x d
K = 22/7 x 21
K = 22 x 3
K = 66
5.
MULTIPLE CHOICE QUESTION
5 mins • 10 pts
Keliling roda sebuah mobil adalah 220 cm. Diameter roda tersebut adalah ...
35 cm
70 cm
100
14 cm
Answer explanation
Keliling = π x diameter
220 cm = 22/7 x diameter
Diameter = 220 : 22/7
Diameter = 220 x 7/22
Diameter = 70 cm
6.
MULTIPLE SELECT QUESTION
10 mins • 10 pts
Sebuah kolam renang berbentuk lingkaran dengan diameter 14 m. Keliling dan luas kolam renang tersebut adalah ....
K = 44 cm
K = 22 cm
L = 616 cm2
L = 154 cm2
Answer explanation
Diameter = 14 m
Jari-jari = ½ x 14 m = 7 m
Keliling = π x d
= 22/7 x 14 m
= 22 x 2 m
= 44 m
Luas = π x r x r
= 22/7 x 7 m x 7 m
= 22 x 7 m2
= 154 m2
7.
MULTIPLE CHOICE QUESTION
10 mins • 10 pts
Sebuah lingkaran luasnya 3.850 cm2. Keliling lingkaran tersebut adalah ...
110 cm
154 cm
220 cm
440 cm
Answer explanation
Luas = π x r x r
3.850 = 22/7 x r2
r2 = 3.850 : 22/7
r2 = 3.850 x 7/22
r2 = 1.225
r = √1.225
r = 35 cm
d = 2 x 35 cm = 70 cm
Keliling = π x d
= 22/7 x 70 cm
= 22 x 10 cm
= 220 cm
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