Tolong bantu di jawab sm caranya ya kak mksh :)

Tolong bantu di jawab sm caranya ya kak mksh :)

K = 1/2πd

= 1/2 × 22/7 × 42

= 22/7 × 21

= 22 × 3

= 66 CM

-☄math ☄

$frac{1}{2} times pi times d = \$

$frac{1}{2} times frac{22}{7} times 42 = \$

$frac{1 times 22 times 42}{2 times 7} = \$

$frac{924}{14} = \$

$66cm$