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Heptagonal

Heptagonal Hep*tag"o*nal, a. [Cf. F. heptagonal.] Having seven angles or sides. Heptagonal numbers (Arith.), the numbers of the series 1, 7, 18, 34, 55, etc., being figurate numbers formed by adding successively the terms of the arithmetical series 1, 6, 11, 16, 21, etc.

Heptagonal Hep*tag"o*nal, a. [Cf. F. heptagonal.] Having seven angles or sides. Heptagonal numbers (Arith.), the numbers of the series 1, 7, 18, 34, 55, etc., being figurate numbers formed by adding successively the terms of the arithmetical series 1, 6, 11, 16, 21, etc.

- Apart from the heptagonal prism and heptagonal antiprism, no convex polyhedron made entirely out of regular polygons contains a heptagon as a face. Regular...

- A heptagonal number is a figurate number that represents a heptagon. The n-th heptagonal number is given by the formula 5 n 2 − 3 n 2 {\displaystyle {\frac...

- primes (137 + 139 + 149 + 151 + 157 + 163 + 167) 1071 – heptagonal number 1072 – centered heptagonal number 1079 – every positive integer is the sum of at...

- the heptagonal prism is the fifth of the infinite set of convex prisms formed by square sides and two regular polygon caps, in this case two heptagons. The...

- of the regular heptagon. All heptagonal triangles are similar (have the same shape), and so they are collectively known as the heptagonal triangle. Its...

- all other dots surrounding the center dot in successive heptagonal layers. The centered heptagonal number for n is given by the formula 7 n 2 − 7 n + 2 2...

- The heptagonal trapezohedron or deltohedron is the fifth in an infinite series of face-uniform (isohedral) polyhedra which are dual polyhedron to the antiprisms...

- the athletic authorities at the schools rejected the "possibility of a heptagonal league in football such as these institutions maintain in basketball,...

- mathematics, a heptagonal pyramidal number is a figurate number representing the number of dots in a three-dimensional pattern in the shape of a heptagonal pyramid...

- the heptagonal tiling is a regular tiling of the hyperbolic plane. It is represented by Schläfli symbol of {7,3}, having three regular heptagons around...

- A heptagonal number is a figurate number that represents a heptagon. The n-th heptagonal number is given by the formula 5 n 2 − 3 n 2 {\displaystyle {\frac...

- primes (137 + 139 + 149 + 151 + 157 + 163 + 167) 1071 – heptagonal number 1072 – centered heptagonal number 1079 – every positive integer is the sum of at...

- the heptagonal prism is the fifth of the infinite set of convex prisms formed by square sides and two regular polygon caps, in this case two heptagons. The...

- of the regular heptagon. All heptagonal triangles are similar (have the same shape), and so they are collectively known as the heptagonal triangle. Its...

- all other dots surrounding the center dot in successive heptagonal layers. The centered heptagonal number for n is given by the formula 7 n 2 − 7 n + 2 2...

- The heptagonal trapezohedron or deltohedron is the fifth in an infinite series of face-uniform (isohedral) polyhedra which are dual polyhedron to the antiprisms...

- the athletic authorities at the schools rejected the "possibility of a heptagonal league in football such as these institutions maintain in basketball,...

- mathematics, a heptagonal pyramidal number is a figurate number representing the number of dots in a three-dimensional pattern in the shape of a heptagonal pyramid...

- the heptagonal tiling is a regular tiling of the hyperbolic plane. It is represented by Schläfli symbol of {7,3}, having three regular heptagons around...

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