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

Tangential Quadrilateral

Revision as of 15:13, 1 January 2014 by Claudeaops (talk | contribs) (creation)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

A tangential quadrilateral is a quadrilateral that has an incircle. If a quadrilateral $ABCD$ is tangential, then $AB + CD= BC + AD$.

Retrieved from "https://artofproblemsolving.com/wiki/index.php?title=Tangential_Quadrilateral&oldid=58477"