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After about 6 sides mathematicians usually refer to these polygons as n-gons. So your 13 sided polygon I would call a 13-gon. Cheers, Walter and Harley Go to Math Central. To return to the previous page use your browser's back button.


In geometry, a nonagon (/ ˈ n ɒ n ə ɡ ɒ n /) or enneagon (/ ˈ ɛ n i ə ɡ ɒ n /) is a nine-sided polygon or 9-gon. The name nonagon is a prefix hybrid formation, from Latin (nonus, "ninth" + gonon), used equivalently, attested already in the 16th century in French nonogone and in English from the 17th century.


An n-gon is a polygon with n sides; for example, a triangle is a 3-gon. A simple polygon is one which does not intersect itself. Mathematicians are often concerned only with the bounding polygonal chains of simple polygons and they often define a polygon accordingly.


What Do You Call a Polygon With Four Sides, None of Which Are the Same Size? What Is a 10-Sided Shape Called? What Do You Call a Shape With Eight Sides? What Is a Regular Shape in Math? Related Search. What Is a Nine-Sided Shape Called? five sided shape 7 sided shape 6 sided shape name area of 5 sided shape 9 sided circle a shape with 9 sides 9 ...


Polygons A polygon is a plane shape with straight sides. Is it a Polygon? Polygons are 2-dimensional shapes. They are made of straight lines, and the shape is "closed" (all the lines connect up).


A regular polygon is a polygon that is both equiangular and equilateral. All sides are equal length placed around a common center so that all angles between sides are also equal. When the number of sides, n, is equal to 3 it is an equilateral triangle and when n = 4 is is a square.


Convex - a straight line drawn through a convex polygon crosses at most two sides.Every interior angle is less than 180°. Concave - you can draw at least one straight line through a concave polygon that crosses more than two sides.At least one interior angle is more than 180°.


The figure shown above consists of a shaded 9-sided polygon and 9 unshaded isosceles triangles.For each isosceles triangle,the longest side is a side of the shaded polygon and the two sides of equal length are extensions of the two adjacent sides of the shaded polygon.What is the value of a ? A. 100 B. 105 C. 110 D. 115 E. 120


So, you were trying to be a good test taker and practice for the GRE with PowerPrep online. Buuuut then you had some questions about the quant section—specifically question 13 of the second Quantitative section of Practice Test 1. Those … Continue reading "The figure above shows a regular 9-sided polygon. What is the value"


Source: Florida Center for Instructional Technology Clipart ETC (Tampa, FL: University of South Florida, 2009)