Art of Problem Solving
AoPS Online
Math texts, online classes, and more
for students in grades 5-12.
Visit AoPS Online ‚
Books for Grades 5-12 Online Courses
Beast Academy
Engaging math books and online learning
for students ages 6-13.
Visit Beast Academy ‚
Books for Ages 6-13 Beast Academy Online
AoPS Academy
Small live classes for advanced math
and language arts learners in grades 2-12.
Visit AoPS Academy ‚
Find a Physical Campus Visit the Virtual Campus

Decagon

Revision as of 14:09, 5 June 2024 by Andliu766 (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

A decagon is a polygon with ten sides. A decagon has interior angles of measure $144^{\circ}$, and exterior angles of measure $36^{\circ}$. The area of a regular decagon with side length $a$ is $\frac{5}{2} a^{2} \sqrt{5+2\sqrt{5}}$

See Also

This article is a stub. Help us out by expanding it.

Retrieved from "https://artofproblemsolving.com/wiki/index.php?title=Decagon&oldid=220080"