Bantu no 1 dan 2 ya. ini soal isiaan bukan pilihan ganda .menggunakan jalan. trima kasih
FAHYUDI
1.a = Diameter = 56 cm Jari - jari = D:2 = 56 cm : 2 = 28 cm Luas = 22/7 x 28 cm x 28 cm = 22 x 4 cm x 28 cm = 88 cm x 28 cm = 2.464 cm2 b = Diameter = 84 cm Jari - jari = D:2 = 84 cm : 2 = 42 cm Luas = 22/7 x 42 cm x 42 cm = 22 x 6 cm x 42 cm = 132 cm x 42 cm = 5.544 cm2 c = Diameter = 86 cm Jari - jari = D:2 = 86 cm : 2 = 43 cm luas = 3,14 x 43 cm x 43 cm = 3,14 x 1.849 cm = 5805,86 cm2 d = Diameter = 67 cm Jari - jari = D:2 = 67 cm : 2 = 33,5 cm Luas = 3,14 x 33,5 cm x 33,5 cm = 3,14 x 1122,25 cm = 3523,865 cm2 e = Diameter = 74,6 cm Jari - jari = D:2 = 74,6 cm : 2 = 37,3 cm Luas = 3,14 x 37,3 cm x 37,3 cm = 3,14 x 1391,29 cm = 42786,506 cm2 f. = Diameter = 69,8 cm Jari - jari = D:2 = 69,8 cm : 2 = 34,9 cm Luas = 3,14 x 34,9 cm x 34,9 cm = 3,14 x 1218,01 cm = 38245,514 cm2 2.a = Jari - jari = 21 dm Luas = 22/7 x 21 dm x 21 dm = 22 x 3 dm x 21 dm = 66 dm x 21 dm = 1.386 dm2 b. = Jari - jari = 27 dm Luas = 3,14 x 27 dm x 27 dm = 3,14 x 729 dm = 2289,06 dm2 c = Jari - jari = 31 dm Luas = 3,14 x 31 dm x 31 dm = 3,14 x 961 dm = 3017,54 d = Jari - jari = 43 dm Luas = 3,14 x 43 dm x 43 dm = 3,14 x 1.849 dm = 5805,86 dm2 e = Jari - jari = 67,8 dm Luas = 3,14 x 67,8 dm x 67,8 dm = 3,14 x 4596,84 dm = 144340,776 dm2 f = Jari - jari = 70,5 dm Luas = 3,14 x 70,5 dm x 70,5 dm = 3,14 x 4970,25 dm = 15606,585 dm2
"Maaf Jika Salah Mohon jika jawaban saya benar semua jadikan jawaban terbaik pliiis ^-^"
Jari - jari = D:2 = 56 cm : 2 = 28 cm
Luas = 22/7 x 28 cm x 28 cm
= 22 x 4 cm x 28 cm
= 88 cm x 28 cm
= 2.464 cm2
b = Diameter = 84 cm
Jari - jari = D:2 = 84 cm : 2 = 42 cm
Luas = 22/7 x 42 cm x 42 cm
= 22 x 6 cm x 42 cm
= 132 cm x 42 cm
= 5.544 cm2
c = Diameter = 86 cm
Jari - jari = D:2 = 86 cm : 2 = 43 cm
luas = 3,14 x 43 cm x 43 cm
= 3,14 x 1.849 cm
= 5805,86 cm2
d = Diameter = 67 cm
Jari - jari = D:2 = 67 cm : 2 = 33,5 cm
Luas = 3,14 x 33,5 cm x 33,5 cm
= 3,14 x 1122,25 cm
= 3523,865 cm2
e = Diameter = 74,6 cm
Jari - jari = D:2 = 74,6 cm : 2 = 37,3 cm
Luas = 3,14 x 37,3 cm x 37,3 cm
= 3,14 x 1391,29 cm
= 42786,506 cm2
f. = Diameter = 69,8 cm
Jari - jari = D:2 = 69,8 cm : 2 = 34,9 cm
Luas = 3,14 x 34,9 cm x 34,9 cm
= 3,14 x 1218,01 cm
= 38245,514 cm2
2.a = Jari - jari = 21 dm
Luas = 22/7 x 21 dm x 21 dm
= 22 x 3 dm x 21 dm
= 66 dm x 21 dm
= 1.386 dm2
b. = Jari - jari = 27 dm
Luas = 3,14 x 27 dm x 27 dm
= 3,14 x 729 dm
= 2289,06 dm2
c = Jari - jari = 31 dm
Luas = 3,14 x 31 dm x 31 dm
= 3,14 x 961 dm
= 3017,54
d = Jari - jari = 43 dm
Luas = 3,14 x 43 dm x 43 dm
= 3,14 x 1.849 dm
= 5805,86 dm2
e = Jari - jari = 67,8 dm
Luas = 3,14 x 67,8 dm x 67,8 dm
= 3,14 x 4596,84 dm
= 144340,776 dm2
f = Jari - jari = 70,5 dm
Luas = 3,14 x 70,5 dm x 70,5 dm
= 3,14 x 4970,25 dm
= 15606,585 dm2
"Maaf Jika Salah Mohon jika jawaban saya benar semua jadikan jawaban terbaik pliiis ^-^"