Question

circle all formulas??

Answer 1

$\pi {r}^{2} \\ \\ 2\pi \: r$

Answer 2

YOUR ALL FORMULAS OF CIRCLES ARE....^_^

=☆》CIRCUMFERENCE OF CIRCLE =》
$2\pi \: r \: or \: \pi \: d$
AREA OF A CIRCLE=》
$\pi \: {r}^{2} or \: \binom{\pi \: d {}^{2} }{4}$
=☆》AREA OF SEMICICLE =
$\binom{\pi \: r {}^{2} }{2}$
AREA OF QUADRANT OF A CIRCLE =
$\binom{\pi \: r {}^{2} }{4}$

_______________________________^_^ :-)