1). luas O = 22/7 x 14² = 616 cm²
kll O = 22/7 x 28 = 88 cm
2). luas O = 22/7 x 10,5² = 346,5 cm²
kll O = 22/7 x 21 = 66 cm
3). 44 = 22/7 x d
d = 44 : 22/7 = 44 x 7/22 = 14 cm
luas O = 22/7 x 7² = 154 cm³
Jawab:
Penjelasan dengan langkah-langkah:
A.Jari-jari=14cm
diameter=14x2=28 cm
keliling lingkaran=πxd
22/7x28cm=88cm
Luas lingkaran=πxrxr
=22/7x14cmx14cm=616 cm^2
B.Diameter=10,5 cm
jari jari=10,5/2=5,25 cm
=3,14x10,5=32,97 cm
luas lingkaran=πxrxr
=3,14x5,25x5,25=86,54625 cm^2
2.keliling lingkaran=44cm
luas=3,14x22cmx22cm=1519,76 cm ^2
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1). luas O = 22/7 x 14² = 616 cm²
kll O = 22/7 x 28 = 88 cm
2). luas O = 22/7 x 10,5² = 346,5 cm²
kll O = 22/7 x 21 = 66 cm
3). 44 = 22/7 x d
d = 44 : 22/7 = 44 x 7/22 = 14 cm
luas O = 22/7 x 7² = 154 cm³
Jawab:
Penjelasan dengan langkah-langkah:
A.Jari-jari=14cm
diameter=14x2=28 cm
keliling lingkaran=πxd
22/7x28cm=88cm
Luas lingkaran=πxrxr
=22/7x14cmx14cm=616 cm^2
B.Diameter=10,5 cm
jari jari=10,5/2=5,25 cm
keliling lingkaran=πxd
=3,14x10,5=32,97 cm
luas lingkaran=πxrxr
=3,14x5,25x5,25=86,54625 cm^2
2.keliling lingkaran=44cm
luas=3,14x22cmx22cm=1519,76 cm ^2