To determine how many heptagons can be formed by joining the vertices of a 10-sided polygon, we can use the combination formula. Specifically, we need to choose 7 vertices from the 10 available. This is calculated as ( \binom{10}{7} ), which is equal to ( \binom{10}{3} ) (since choosing 7 vertices to include is the same as choosing 3 vertices to exclude). Thus, ( \binom{10}{3} = \frac{10!}{3!(10-3)!} = 120 ). Therefore, 120 heptagons can be drawn by joining the vertices of a 10-sided polygon.
5 diagonals * * * * * That is not correct since two of these would be lines joining the vertex to adjacent vertices (one on either side). These are sides of the polygon, not diagonals. The number of diagonals from any vertex of a polygon with n sides is n-3.
10 ... any polygon it is 2 less than the number of sides or vertices wince they are the same.
It consists of 98 triangles and has 4850 diagonals
The line segment joining the opposite vertices of a quadrilateral is known as a diagonal. Each quadrilateral has two diagonals, which can be drawn by connecting pairs of non-adjacent vertices. Diagonals help in analyzing the properties of the quadrilateral, such as area and symmetry, and can also be used in various geometric calculations.
A dodecagon is a regular polygon that can be drawn using rotations. These are normally drawn in a Geometer's Sketchpad.
120
10c5
5 diagonals * * * * * That is not correct since two of these would be lines joining the vertex to adjacent vertices (one on either side). These are sides of the polygon, not diagonals. The number of diagonals from any vertex of a polygon with n sides is n-3.
This is a diagonal line. The definition of a diagonal is a line that joins two nonconsecutive vertices or corners of a polygon.
10 ... any polygon it is 2 less than the number of sides or vertices wince they are the same.
N-2 according to yahoo answers
It consists of 98 triangles and has 4850 diagonals
n-3 diagonals. Of the n vertices of the polygon, you cannot draw diagonals to the two adjacent vertices since these are sides of the polygon and so not diagonals. And you cannot draw a diagonal from a vertex to itself. So those are three vertices that are ruled out, leaving n-3.
Suppose a polygon has n vertices (and sides).From each vertex, a diagonal can be drawn to all vertices, excluding itself and the two adjacent vertices. So n-3 diagonals can be drawn from each vertex.Multiplying by the full complement of n vertices gives n(n-3). However, as things stand we have counted each diagonal twice: once at both ends. Dividing by two gives the actual number of diagonals.number of diagonals = n(n-3)/2
Suppose a polygon has n vertices (and sides). From each vertex, a diagonal can be drawn to all vertices, excluding itself and the two adjacent vertices. So n-3 diagonals can be drawn from each vertex. Multiplying by the full complement of n vertices gives n(n-3). However, as things stand we have counted each diagonal twice: once at both ends. Dividing by two gives the actual number of diagonals. number of diagonals = n(n-3)/2
In a Frequency Polygon, a line graph is drawn by joining all the midpoints of the top of the bars of a histogram. A frequency polygon gives the idea about the shape of the data distribution. The two end points of a frequency polygon always lie on the x-axis.
A dodecagon is a regular polygon that can be drawn using rotations. These are normally drawn in a Geometer's Sketchpad.