The endings of two arcs, or of one arc and one straight line , can also be joined , displaying a pointed tip. Just as angles can be acute or obtuse, the place where two lines meet to form an angle [the pointed tip] can be sharp or blunt.
Angles and tips in a shape can be rounded by using tiny arcs.
[Wong, Wucius. Principals of Two-Dimensional Form. New York: Van Nostrand Reinhold Company, 1988.]
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