**4.**Has a pair of parallel sides. a four sided shape with a pair of opposite parallel sides.**5.**pairs of opposite angles made by two intersecting lines.They are always equal.**8.**Two angles whose sum is 180 degrees. Must equal to 180.**11.**with 7 sides. Also, is called a septagon.**13.**Two angles that have a common side. And and a common vertex and don't overlap**14.**An angles that is exactly 180 degrees. An angles whose side lie in opposite directions from the vertex.**18.**Shapes with 8 sides. A flat shape with straight lines.**19.**A shape with 3 sides.A polygon with three edges and three vertices.**20.**Shapes with 6 sides. A flat shape with straight lines.

**1.**A corner point.The common endpoint of two or more line segments.**2.**Shapes with 4 sides. A flat shape.**3.**Shapes with 9 sides. A flat shape with straight lines.**6.**An angle that is more than 90 degrees. But less than 180 degrees.**7.**Shapes with 5 sides.A flat shapes with straight lines.**9.**Angles is formed when two lines intersect.Two angles are said to be linear if they are adjacent angles formed by two intersecting lines.**10.**Two angles whose sum is 90 degrees. Add up to 90.**12.**When you cover a surface with a pattern with flat shapes so there are no gaps of overlaps. An arrangement of shapes closely fitted together.**15.**An angles that is exactly 90 degrees. Formed by two sides that are perpendicular.**16.**plane shape with straight lines. It can be a triangle, rectangles or an pentagon..**17.**An angles that is less than 90 degrees But more than than zero degrees