Penjelasan dengan langkah-langkah:
1). 2.π.r = K
2.3,14.r = 90
6,28r = 90
r = 90/6,28
r = 14,3312102 atau 14cm
2). 2.π.r = 44
2.3,14.r = 44
6,28r = 44
r = 44/6,28
r = 7cm
Luas = π.r.r
Luas = 22/7.7.7
Luas = 154cm²
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Verified answer
Penjelasan dengan langkah-langkah:
1). 2.π.r = K
2.3,14.r = 90
6,28r = 90
r = 90/6,28
r = 14,3312102 atau 14cm
2). 2.π.r = 44
2.3,14.r = 44
6,28r = 44
r = 44/6,28
r = 7cm
Luas = π.r.r
Luas = 22/7.7.7
Luas = 154cm²