A.
Diketahui jari jari (r) = 14
luas lingkaran = πr²
seperempat lingkaram = ¼πr²
¼ × 22/7 × 14² = ¼ × 22 × 28 = 154cm²
luas setengah lingkaran = ½πr²
½×22/7×7²
11×7 = 77 cm²
Luas yang diarsirnya
154-77 = 77 cm²
B.
diameter lingkaran besar = 14 × 3 = 42cm
r = 21cm
luas = 22/7 × 21 × 21 = 22 × 3 × 21 = 66 × 21 = 1386cm²
luas lingkaran kecil = 22/7 × 7 × 7 = 22 × 7 = 154 cm²
1386 - 154 = 1232 cm²
" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
A.
Diketahui jari jari (r) = 14
luas lingkaran = πr²
seperempat lingkaram = ¼πr²
¼ × 22/7 × 14² = ¼ × 22 × 28 = 154cm²
luas setengah lingkaran = ½πr²
½×22/7×7²
11×7 = 77 cm²
Luas yang diarsirnya
154-77 = 77 cm²
B.
diameter lingkaran besar = 14 × 3 = 42cm
r = 21cm
luas = 22/7 × 21 × 21 = 22 × 3 × 21 = 66 × 21 = 1386cm²
luas lingkaran kecil = 22/7 × 7 × 7 = 22 × 7 = 154 cm²
1386 - 154 = 1232 cm²