KD. 3.5: 2. Luas Lingkaran
Authored by Agustina Fauza
Mathematics
4th - 6th Grade
Used 95+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Luas lingkaran pada gambar adalah . . . .
145 cm²
154 cm²
451 cm²
415 cm²
Answer explanation
Luas Lingkaran
= π r2
= 22/7 X 7 cm X 7 cm
(7 dan 7 saling bagi)
= 22 X 7 cm
= 154 cm2
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Luas lingkaran pada gambar adalah . . . .
154 cm²
616 cm²
1.386 cm²
2.464 cm²
Answer explanation
Luas Lingkaran
= π r2
( r = 28:2 = 14 cm )
= 22/7 X 14 cm X 14 cm
( 7 dan 14 saling bagi )
= 22 X 2 cm X 14 cm
= 44 cm X 14 cm
= 616 cm2
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Luas lingkaran yang berdiameter 20 cm adalah . . . .
0,314 cm²
3,14 cm²
31,4 cm²
314 cm²
Answer explanation
Luas lingkaran
= π r2
( r = 1/2 X d = d : 2 )
( r = 20 : 2 = 10 cm )
= 3,14 X 10 cm X 10 cm
= 314 cm2
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Luas bangun pada gambar adalah . . . .
1246
1256
1266
1276
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Luas bangun pada gambar adalah . . . .
462
482
542
562
Answer explanation
Luas Bentuk Lingkaran
= 3/4 π r2
= 3/4 X 22/7 X 14 cm X 14 cm
(7 dan 14 saling bagi)
= 3/4 X 22 X 2 cm X 14 cm
(4 dan 2 saling bagi)
= 3/2 X 22 cm X 14 cm
(2 dan 22 saling bagi)
= 3 X 11 cm X 14 cm
= 462 cm2
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Emir mempunyai selembar kertas berbentuk lingkaran dengan luas 616 cm². Diameter kertas Emir adalah . . . .
A. 28 cm
C. 29 cm
B. 82 cm
D. 92 cm
Answer explanation
Luas Lingkaran
= π r2
= 22/7 r2 = 616 cm2
r2 = 616 cm2 : 22/7
r2 = 616 cm2 X 7∕22
(616 dan 22 saling bagi)
= 28 cm2 X 7
= 196 cm2
r = √196 cm2
= 14 cm
d = 2r
= 2 X 14 cm
= 28 cm
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Luas lingkaran pada gambar di atas adalah . . . .
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