pentagon
noun
a polygon having five angles and five sides.
pentagonal
-
a word derived from
pentagon.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
One especially important milestone occurs when five larger protein building blocks connect to form a closed pentagonal ring.
From Science Daily ● Oct. 22, 2026
Continental Drift is Earth in miniature, mapped onto a truncated icosahedron — a soccer ball — with its regular patchwork of 12 pentagonal faces and 20 hexagonal faces.
From New York Times ● Jan. 1, 2023
The 20 hexagonal and 12 pentagonal panels were traditionally made of leather and stitched together.
From Scientific American ● Nov. 19, 2022
The new World Cup ball comes from historic stock: the original Telstar was the first ball to use the now-familiar truncasted icosahedrom — 12 black pentagonal panels and 20 white ones.
From Los Angeles Times ● May 21, 2018
It was smooth, pentagonal, with three display windows that all blinked with numbers.
From "The Last Last-Day-of-Summer" by Lamar Giles
