A square.
Triangle is plane with three sides and three angles. The sum of its inside angles is equal to 180 degrees.
square
A sguar.
A rectangle is a quadrilateral, which is a plane figure bounded by four straight sides. Both opposite pairs of sides are equal in length and all four vertices are right angles.
equilateral parallelogram
square or rhombus
a plane figure having six sides is a hexagon
A rectangle, or in some cases, a square.
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.
A square is a plane geometric figure having 4 equal sides and 4 right angles.
A perfect square Four 90 degree angles and four equal sides
A regular polygon is a plane figure with equal sides and equal angles.