Trapzoid, A quadrilateral having only two sides parallel., Parallelogram, A four-sided plane rectilinear figure with opposite sides parallel., Rhombus, A parallelogram with opposite equal acute angles, Rectangle, A plane figure with four straight sides and four right angles, Quadrilaterals, A quadrilateral is a polygon that has exactly four sides., Acute angle , Acute angles measure less than 90 degrees, Right angle, Right angles measure 90 degrees., Obtuse angle, Obtuse angles measure more than 90 degrees, Triangle, A triangle is a closed, two-dimensional shape with three straight sides., Oval, Is any curve that looks like an egg or an ellipse., Hexagon, A hexagon can be defined as a polygon with six sides., Octagon, Is a polygon made up of 8 sides., Shapes, The quality of a distinct object or body in having an external surface or outline of specific form or figure., Circle, Is the locus of all points equidistant from a central point..

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