A regular pentagon. A regular pentagon has five sides of equal length and its five angles are also equal. The term regular implies the notion of equal sides and equal angles.
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No, an isosceles triangle has two sides of equal length. An equilateral triangle has all three sides of equal length.
Angles are not necessarily equal, and sides are not necessarily equal in length.Angles are not necessarily equal, and sides are not necessarily equal in length.Angles are not necessarily equal, and sides are not necessarily equal in length.Angles are not necessarily equal, and sides are not necessarily equal in length.
A quadrilateral. If the short sides are equal in length and the long sides are equal in length then it is a kite. Otherwise it could be a trapezium (eg one with sides 4, 5, 16, 13) or it is an irregular quadrilateral.
A regular pentagon has 5 equal sides. An irregularpentagon has 5 sides that are not all equal.