Question

Nomor 5 ya please!!!!

Answer 1

Diameter lingkaran besar = 42 cm
jadi r = 21 dm
Luas 1/2 lingkaran besar = 1/2 r²
= 1/2 x 22/7 x 21²
= 693 cm²

Diameter lingkaran kecil = 14 cm
jadi r = 7 cm
Luas 1/2 lingkaran kecil = 1/2 r²
= 1/2 x 22/7 x 7²
= 77 cm²

Total luas = 693 + 77 = 770 cm²

Keliling = 1/2 K besar + 1/2 K kecil + 14 + 14
= (1/2 x 2 x 22/7 x 21 ) + (1/2 x 2 x 22/7 x 7) + 14 + 14
= 66 + 22 + 14 + 14
= 116 cm