The only shape that always has equal sides and equal angles is the square.
Other shapes can have equal sides and angles (like a triangle or octagon), but they are not by definition equilateral.
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I think it is worth noting that any regular polygon satisfies the definition. Conversely, as you point out, you have to explicitly specify that it is regular.
A decagon - if the sides are all equal, and the angles are all equal, it is a regular decagon.
A four-sided polygon with all sides equal and no right angles would be a rhombus. A rhombus consists of two acute angles and to obtuse angles.
Such a figure is called a square. Actually only one right angle is enough to force the the other angles to be right, and if three sides are equal, that forces all sides in such a figure to be equal. Exercise: Prove that any 4-sided figure( called a quadrilateral in math books) with three equal sides and one right angle is a square.
A regular polygon (a closed plane figure of straight lines) has all equal angles and all equal side lengths. For example, a square is a regular quadrilateral, because it's four edges are all the same length, and it's angles are all equal (90 degrees). A regular triangle is an equilateral triangle.An irregular polygon does not have equal sides and angles. N.B to be regular, a polygon must have both equal sides and equal angles. If a polygon has equal sides but unequal angles it is not a regular polygon.
A regular quadrilateral is a square. It is a four-sided figure with all sides being the same length and all angles equal (right angles).
The figure is a Regular polygon.
an equilateral triangle has all its angle and sides equal
square
polygon
equilateral parallelogram
rectangles squares
Any "regular" polygon.
If all of the sides are equal and it is a four sided figure then it is either a rhombus or a square. If all of the angles are also equal then it is a square.
This depends what the figure is referencing. A figure is only a square if it has four sides, all equal, connected by four angles, all right angles (90°).
it is an equilateral trianglethanks for yaws other answers!
It is a Rhombus.
Four sided figure. All sides are the same length. All angles are equal. Four right angles. Both diagonals are equal.