Soal No. 2 A. r 1= 14 cm dan r2 = 7 cm K = 1/2.2πr₁ + 2πr₂ K = 22/7 × 14 + 22/7 x 7 K = 44 cm + 22 cm K seluruh = 44 + 22 = 66 cm
B. r = 14 cm K = 4s + 1/2 × 2πr K = 4 . 26 + 22/7 . 14 = 148 cm
Soal No 3 A. Luas persegi= 14 x 14 = 196 cm² Luas lingkaran= 22/7 x 14 x 14/2= 308 cm² Luas gabungan = 196 +308=504 cm² Keliling = (14 x 3) + 22 = 42+22 = 64 cm
B. Luas lngkaran= 3,14 x 5 x 5 = 78,5 cm² Luas persegi= (10 x 10) - {Luas 1/2 lingkaran}= 100cm² - 39,25 cm² = 60.75cm² Luas gabungan = 78,5 + 60,75 = 139,25 Keliling = 31,4+30+7,85 = 69,25 cm
Verified answer
Soal No. 2A. r 1= 14 cm dan r2 = 7 cm
K = 1/2.2πr₁ + 2πr₂
K = 22/7 × 14 + 22/7 x 7
K = 44 cm + 22 cm
K seluruh = 44 + 22 = 66 cm
B. r = 14 cm
K = 4s + 1/2 × 2πr
K = 4 . 26 + 22/7 . 14
= 148 cm
Soal No 3
A. Luas persegi= 14 x 14 = 196 cm²
Luas lingkaran= 22/7 x 14 x 14/2= 308 cm²
Luas gabungan = 196 +308=504 cm²
Keliling = (14 x 3) + 22 = 42+22 = 64 cm
B. Luas lngkaran= 3,14 x 5 x 5 = 78,5 cm²
Luas persegi= (10 x 10) - {Luas 1/2 lingkaran}= 100cm² - 39,25 cm² = 60.75cm²
Luas gabungan = 78,5 + 60,75 = 139,25
Keliling = 31,4+30+7,85 = 69,25 cm