pentagon
noun (pentagon, pentagons; the Pentagon — a building)
Everyday
- A pentagon is a flat shape with 5 straight sides and 5 corners. tree →
- The Pentagon is a big five-sided building in the USA where the army leaders work. tree →
In the lessons
In maths: a shape with 5 sides; perimeter of a pentagon; counting sides; a regular pentagon has equal sides and equal angles. In nature and science: starfish and okra slices have five-part shapes. In everyday life: a soccer ball has pentagons on it; «home plate» in baseball is a pentagon.
Examples
- A pentagon has 5 sides. tree →
- Each side of the pentagon is 4 cm. tree →
- What is the perimeter of the pentagon? tree →
- How many sides do 3 pentagons have? tree →
- A classic soccer ball has 12 black pentagons. tree →
- Home plate in baseball is shaped like a pentagon. tree →
- Draw a pentagon and join its corners to make a star. tree →
- The Pentagon is in Virginia. tree →
Note
Hidden number: 5 sides. Perimeter of a regular pentagon = 5 × side. Trap: not every pentagon has equal sides. The angles inside a regular pentagon are each 108 degrees. «Penta» means five, as in pentathlon. A shape with 6 sides is a hexagon.
On Mova
- Trees and pragmatics of «pentagon» in the school dictionary: every meaning and example parsed by Mova, with its dependency tree and frames.
- «pentagon» in the school dictionary on Mova free.
This page in Markdown → https://md.dictionary.elamur.ai/free/en/english/pentagon/