8
It is 8 triangles
A decagon has 10 sides. To find the number of pairs of parallel diagonals in a decagon, we need to consider the possible combinations of diagonals that are parallel to each other. Each vertex can connect to 5 other vertices with a diagonal, but not all of these diagonals will be parallel. Therefore, the number of pairs of parallel diagonals in a decagon is 10 choose 2, which equals 45 pairs.
A heptagon has seven sides, so when drawing diagonals from one vertex, it will create five triangles. This is because each diagonal drawn from a single vertex will create a triangle until it intersects the previous diagonal. Therefore, the number of triangles formed by drawing all diagonals from one vertex in a heptagon is five.
A decagon has 35 diagonals. A Nonagon has 27 diagonals. An Octagon has 20 diagonals. A Heptagon has 14 diagonals. A Hexagon has 9 diagonals. A Pentagon has 5 Diagonals. A Square has 2 Diagonals. A triangle has 0 Diagonals.Do you get the point?0+2+3+4+7+8. Starting with the triangle.you don't need to start with the triangle because it is 0 diagonals and will not count when you add it up anyways. And don't call it a square, call it a quadrilateral.Shut up-------Imagine a hexagone-There are two vertices at the top which make a horizontal line- Opposite them there are 2 vertices on the bottom which we can draw straight lines totherefore-There would have been 6 connections per point, but we eliminated 3(n-3)---The connections occur for every vertex in the shapethereforen(n-3)--We don't want to draw the same connections twice once we get around to vertices on the opposite side of the shapethereforen/2(n-3)where n is the number of facesThis may be applied to many if not all polygons. A Decagon has 36 sides not 35...There are 35 diagonals in a 10 sided decagon
6 triangles because there are 180 degrees in a triangle and 6*180 = 1080 degrees which is the sum of the angles in octagon when added up.
A regular decagon can be divided into triangles by drawing diagonals from one vertex to all other non-adjacent vertices. This method results in a total of 8 triangles. Alternatively, using the formula for the number of triangles formed in a polygon, which is ( n - 2 ) (where ( n ) is the number of sides), a decagon (10 sides) can be divided into ( 10 - 2 = 8 ) triangles.
The number of triangles formed by the diagonals of a 21 sided polygon is C(21,3) = 21x20x19/3x2x1 = 1,330.
8
It is 8 triangles
It is: 0.5*(10 squared - (3*10)) = 35 diagonals
It is: 8 because 8 triangles make up a 10 sided polygon
A decagon has 35 diagonals. This can be computed by multiplying ten by seven and dividing by two. Seven is derived from the number of sides minus three.
A heptilion is a geometric figure with seven sides, also known as a heptagon. However, if you're referring to the number of triangles that can be formed within a heptagon, you can create multiple triangles by connecting various vertices. Specifically, you can divide a heptagon into 5 triangles using diagonals, which is calculated using the formula for the number of triangles formed in an n-gon: ( n - 2 ). Therefore, a heptagon contains 5 triangles.
A decagon has 10 sides. To find the number of pairs of parallel diagonals in a decagon, we need to consider the possible combinations of diagonals that are parallel to each other. Each vertex can connect to 5 other vertices with a diagonal, but not all of these diagonals will be parallel. Therefore, the number of pairs of parallel diagonals in a decagon is 10 choose 2, which equals 45 pairs.
Diagonals in an hexagon: 0.5*(6^2 -3*6) = 9 diagonals
50
Number of sides minus 2 equals the number of triangles within the polygon.