![]() ![]() Pentagon, the large five-sided building that serves as the headquarters of the U.S.Scalene triangle, quadrilaterals such as a rectangle, trapezoid or a kite, irregular pentagon, and hexagons are common examples of the irregular polygon. A shape can be defined as the boundary or outline of an object which is made by combining curves, points, and line segments. Any polygon that is not regular is thus an irregular polygon. It is a polygon that has sides of unequal length and angles of unequal measure. Triangle, quadrilateral, pentagon, and hexagon are common examples of the regular polygon. It has 12 faces, and all are like pentagons. Learn how to calculate its perimeter, area, and angles using formulas and examples. It has 14 diagonals and can be regular or irregular. A dodecagon is also called a regular polyhedron whose all faces are of the same shape. A heptagon is a seven-sided polygon with seven angles, seven vertices, and seven edges. A regular polyhedron is a 3D shape having all faces of the same shape. A regular polygon is thus both equilateral and equiangular. A polyhedron is a solid and 3D shape that contains flat surfaces and straight edges. It is a polygon having all sides of equal length and all interior angles of equal measure. Some diagonals of a concave polygon lie outside the closed figure.Ī dart or an arrowhead in quadrilaterals, some irregular pentagon and hexagon are common examples of the concave polygon. Triangles, all convex quadrilaterals, regular pentagon, and regular hexagon are common examples of a convex polygon.Īlso known as a non-convex polygon, it is a polygon having at least one of its interior angles measuring more than 180°. Square A square is a 2-dimensional 4 sided polygon. A rectangle have 4 sides, 4 angles and 4 vertices. The sum of the angles of a regular Heptagon is 900°. A heptagon is regular if all of its sides and angles are equal. The word heptagon comes from two words: hepta, meaning seven, and gon meaning sides. Rectangle A rectangle is a 2-dimensional 4 sided polygon. A heptagon is a 7 sided shape called a polygon. All the diagonals of a convex polygon lie inside the closed figure. 2D Shapes Names and Properties Definition and Properties 2-dimensional shapes have 2 dimensions length and width. It is a polygon that has all its interior angles less than 180°. Types of Polygon Others Ways of Classifying Polygons 1) Based on Interior Angles ![]()
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