It's a short article or essay. It expresses a writer's opinions.
It's about a particular issue.
all above- apex:)
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The characteristic length of a cube refers to the length of a side of a cube. Since the length of all the sides of a cube are the same, the characteristic length refers to all sides.
The flag of Taiwan does not share a geometric characteristic.
A line segment has distinctive end points.
Yes.
All four sides are parallel.