Penjelasan dengan langkah-langkah:
1) lingkaran
2) a. 14 cm ( sudah tertera pada gambar )
b. d = 2 × r
= 2 × 14 = 28 cm <- diameter
3) r = 1/2d
4) d = 2r
5) rumus luas lingkaran = πr²
= ¼ π d²
6) rumus keliling lingkaran = π × d
= π × 2 × r
7) luas lingkaran = πr²
= 22/7 × 14^2
= 616 cm
keliling lingkaran = π × d
= 22/7 × 28 cm
= 88 cm
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Penjelasan dengan langkah-langkah:
1) lingkaran
2) a. 14 cm ( sudah tertera pada gambar )
b. d = 2 × r
= 2 × 14 = 28 cm <- diameter
3) r = 1/2d
4) d = 2r
5) rumus luas lingkaran = πr²
= ¼ π d²
6) rumus keliling lingkaran = π × d
= π × 2 × r
7) luas lingkaran = πr²
= 22/7 × 14^2
= 616 cm
keliling lingkaran = π × d
= 22/7 × 28 cm
= 88 cm