Luas = πr²1386 / 22/7 = r²1386 cm² × 7/22 = r²√441 cm² = r21 cm = rKeliling= 2 πr= 2 × 22/7 × 21 cm= 132 cm
L = \pi r^21.386 = 22/7 . r^2r^2 = 7/22 * 1386r^2 = 441r = \sqrt{441} r = 21k = 2\pi r atau \pi dk = 2 . 22/7 . 21= 132 |
violincantika violincantika
Luas = πr²1386 / 22/7 = r²1386 cm² × 7/22 = r²√441 cm² = r21 cm = rKeliling= 2 πr= 2 × 22/7 × 21 cm= 132 cm
L = \pi r^21.386 = 22/7 . r^2r^2 = 7/22 * 1386r^2 = 441r = \sqrt{441} r = 21k = 2\pi r atau \pi dk = 2 . 22/7 . 21= 132 |