We think of a kite shaping having 2 equal lines forming an inverted V, and 2 shorter equal lines which link from each side of the V to the bottom of the kite.
If you draw a straight line from the top of the kite to the bottom you will form 2 congruent (same size and shape) triangles . Since the triangles are congruent, meaning copies of each other it follows that the angles between the unequal sides are themselves equal.
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A regular polygon has equal angles AND sides.
Rhombus = 4 equal sides Rectangle = 4 equal angles Square = 4 equal sides and 4 equal angles Rhomboid = unequal adjacent sides and angles
scalene-unequal length sides and unequal anglesisosceles-two equal length sides(legs) and two equal anglesequilateral- three equal length sides and three equal angles
A rectangle is a plane figure with four straight sides and four right angles, esp. one with unequal adjacent sides. A square is a plane figure with four equal straight sides and four right angles. A rhombus is a parallelogram with opposite equal acute angles, opposite equal obtuse angles, and four equal sides.
It is a dodecagon. While it is irregular, so is a dodecagon with equal sides but unequal angles, so "irregular" is not enough.