What is a five sided polygon called?
476849
a pentagon, or a regular pentagon, depending on if all the sides & angles are equal or not. hope that helped.
507349
In geometry, a rectangle is defined as a quadrilateral polygon in which all four angles are right angles.\n\nFrom this definition, it follows that a rectangle has two pairs of opposite sides of equal length; that is, a rectangle is a parallelogram. A square is a special kind of rectangle where all four sides have equal length; that is, a square is both a rectangle and a rhombus. A rectangle that is not a square is colloquially known as an oblong.\n\nOf the two opposite pairs of sides in a rectangle, the length of the longer side is called the length of the rectangle, and the length of the shorter side is called the width. The area of a rectangle is the product of its length and its width; in symbols, A = lw. For example, the area of a rectangle with a length of 5 and a width of 4 would be 20, because 5 × 4 = 20. See the picture above right.
526908
You never mentioned that there are smaller squares that make up this 5x5 shape. Therefore, the technical answer is one. For all we know...5x5 could be referring to inches or some other measurement.
598810
a regular polygon has the same angles and sides while a irregular one has different sides and angles.
1092713
triskaidecagon\n\nor a 13-sided polygon, haha.\n\nCheck the source for polygon names from 1-20 sides  :)
953427
Sides Name \nn N-gon \n3 Triangle \n4 Quadrilateral \n5 Pentagon \n6 Hexagon \n7 Heptagon \n8 Octagon \n10 Decagon \n12 Dodecagon \n\nNames for other polygons have been proposed.\n\nSides Name \n9 Nonagon, Enneagon  \n11 Undecagon, Hendecagon \n13 Tridecagon, Triskaidecagon \n14 Tetradecagon, Tetrakaidecagon \n15 Pentadecagon, Pentakaidecagon \n16 Hexadecagon, Hexakaidecagon \n17 Heptadecagon, Heptakaidecagon \n18 Octadecagon, Octakaidecagon \n19 Enneadecagon, Enneakaidecagon \n20 Icosagon \n30 Triacontagon \n40 Tetracontagon \n50 Pentacontagon \n60 Hexacontagon \n70 Heptacontagon \n80 Octacontagon \n90 Enneacontagon \n100 Hectogon, Hecatontagon \n1,000 Chiliagon \n10,000 Myriagon \n\nTo construct a name, combine the prefix+suffix\n\nSides Prefix \n20 Icosikai... \n30 Triacontakai... \n40 Tetracontakai... \n50 Pentacontakai... \n60 Hexacontakai... \n70 Heptacontakai... \n80 Octacontakai... \n90 Enneacontakai... \n + Sides Suffix \n+1 ...henagon \n+2 ...digon \n+3 ...trigon \n+4 ...tetragon \n+5 ...pentagon \n+6 ...hexagon \n+7 ...heptagon \n+8 ...octagon \n+9 ...enneagon
1052606
A minimum of 3 - where the three polygons are all equilateral triangles.\nIf they are all different, then a minimum of 5 - a regular pentagon.\n\nThe maximum number of sides which the largest polygon could have is ∞ that is a circle.\n\nThe limiting factor (assuming we are talking 2 dimensions) is that the sum of the internal angles does not exceed 360°.\nThe circle's internal angle approaches 180°. the other two regular polygons could be two squares or an equilateral triangle with either another triangle, a square or a regular pentagon.
703879
This sounds like plane geometry where you have an n sided polygon and want to know how many diagonals you can draw.  From each vertex, you can draw a diagonal to every other vertex except to yourself and the two next to you (those two line make sides of the polygon not diagonals).  So for n sides (which means n vertices), you can draw n-3 diagonals at each vertex.  This gives (n-3)*n.  But this just counts the starting end of each line. Whenever you draw one of these lines, it goes to another vertex.  If we drew (n-3)*n lines, we would traces over each diagonal twice, once from each end so there are only half as many diagonals as that.\n\nThe answer then is: (n-3)*n/2
1051814
An *exterior* angle for a polygon is formed by extending one side of the polygon from one if its endpoints. The exterior angle and interior angle are therefore supplementary. If you extend each side of a polygon to form one exterior angle at each vertex, you get a set of exterior angles as shown in the attached diagram.\nhttp://www.geom.uiuc.edu/~dwiggins/pict09.GIF\n\nBe careful because some people have a mistaken definition of exterior angles and assume it is the full obtuse angle, but it isn't.\n\nBy theorom, the exterior angles in a convex polygon always add up to 360 degrees.  A regular 10-sided polygon is one example of a convex polygon, so its exterior angles would also add up to 360 degrees.  Because all the angles are equal in a regular polygon you would have:\n\n360 / 10\n= 36 degrees\n\nSo with a regular decagon (10-sided polygon), each exterior angle would be 36 degrees.
598966
1- line segment\n2- angle\n3 -triangle\n4 - square, rectangle, rhombus, diamond, parallelogram, or quadrilateral\n5-pentagon\n6-hexagon\n7-heptagon
328495
now, if you add that it has 4 sides and all right angles, you probably can pass that off as the definition of a rectangle.\n\notherwise you just have a parallelogram.
623411
Pentagon = 5, decagon = 10, quadrilateral = 4, and heptagon = 7.
630757
A pentagon has 5 sides of equal length if that is what you are asking.
473930
polygons are 2 dimensional shapes. they must have all straight sides and they must be closed. some examples are squares triangles, etc.  circles aren't because they  have 1 curved side.\n\npolyhedrons are 3-d shapes that have all flat sides and have no openings. ex: cube. spheres, cones, and cylinders are not because they all have curved sides.
610142
A line segment joining two adjacent vertices of a polygon is called an edge. A line segment joining two non-adjacent vertices is called a diagonal.
240497
Here is some information about tiling regular polygons (tiling is also called tessellation):\nhttp://mathforum.org/sum95/suzanne/whattess.html
824935
With three points you form a triangle, with four points a quadrilateral. Regions "outside" the polygon are equal to the number of sides (the number of points). The number of regions inside the polygon is the interesting number.\n\nFor two points, there are no regions "inside" the polygon.\nFor three points, there is one region inside the polygon.\nFor four points, there are four regions inside.