heptagonal

heptagonal

A child draws a heptagonal stop sign in art class.

Definition

Adjective - Having seven sides and seven angles: "heptagonal" describes a shape or polygon that possesses exactly seven straight sides and seven interior angles.

Usage Examples
  • (The building has seven sides.)
  • (A geometric solid with seven-sided bases.)
  • (The coin had seven edges.)
Advanced Usage
  • "heptagonal symmetry": a type of rotational symmetry found in shapes with seven equal sides.
    • The flower exhibited heptagonal symmetry, a rare occurrence in nature. (The flower had a seven-fold pattern.)
  • "heptagonal number": a figurate number that represents a heptagon.
    • The seventh heptagonal number is 28. (A number that can be arranged as a heptagon.)
Variants and Related Words
  • Heptagon (noun): a seven-sided polygon.
    • Draw a regular heptagon with all sides equal. (A seven-sided shape.)
  • Heptagonal (adjective): as defined above.
  • Heptagonally (adverb): in a heptagonal manner.
    • The tiles were arranged heptagonally. (Arranged in a seven-sided pattern.)
Synonyms
  • Seven-sided: having seven sides.
    • A seven-sided figure is called a heptagon. (A polygon with seven edges.)
  • Septangular: an older term meaning having seven angles.
    • The septangular tower was a landmark. (A tower with seven corners.)
Related Idioms

No common idioms exist for "heptagonal" due to its technical nature. It is primarily used in geometry, architecture, and design contexts.