The length of a minor arc of $\odot( O , 7)$ can be $\ldots \ldots \ldots \ldots$ units.
The length of a minor arc of $\odot( O , 7)$ can be $\ldots \ldots \ldots \ldots$ units.
- A
$22$
- B
$28$
- C
$12$
- D
$32$
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