panjang jika diketahui :
Penjelasan dengan langkah-langkah:
1)
Jari jari = 20 Cm
Luas :
= π × r × r
= 3,14 × 20 × 20
= 3,14 × 400
= 1.256 Cm²
2)
Jari jari = 35 Cm
Luas :
= π × r × r
= 22/7 × 35 × 35
= 22 × 5 × 35
= 3.850 Cm²
3)
Diameter = 10 Cm ÷ 2 = 5 Cm
Luas :
= π × r × r
= 3,14 × 5 × 5
= 3,14 × 25
= 78,5 Cm²
4)
Diameter = 14 Cm ÷ 2 = 7 Cm
Luas :
= π × r × r
= 22/7 × 7 × 7
= 22 × 7
= 154 Cm²
5)
Diameter = 28 Cm ÷ 2 = 14 Cm
Luas :
= π × r × r
= 22/7 × 14 × 14
= 22 × 2 × 14
= 616 Cm²
Cara dan Jawaban terlampir pada foto
[answer.2.content]
