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An OBLONG is generally a rectangular shape with the two shortest ends in semi-circular form.
it is a heart looking shape. and the ends are rigid
Rectangle
The shape of an almond is an oval with quite sharp ends. amygdaloid
It is an angle
Oval?
The potential difference between the ends of a conductor is called voltage.
A cylinder has two flat ends.
triangle
Waterspout.
Tetrahedron.
circle