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Verified answer
Menentukan Luas LingkaranRumus
Luas Lingkaran = π r^2
Keliling Lingkaran = 2 π r
Soal
Keliling lingkaran = 88 cm
Luas Lingkaran = ...
Penyelesaian
88 cm = 2 × 22/7 × r
88 cm = 44/7 × r
r = 88 cm / 44/7
r = 14 cm
Luas Lingkaran
=> 22/7 × 14 × 14
=> 22 × 2 × 14
=> 616 cm^2
2r = 88 ÷ 22/7
2r = 88 x 7/22
2r = 28
r = 28/2
r = 14 cm
Luas
= π x r²
= 22/7 x 14 x 14
= 22/7 x 196
= 616 cm²