Skip to content
Library
Solve
Practice
Search 7,000+ topics
/
Color theme
Dark
Light
Sign in
Library
Solve
Practice
Search everything
About Expii
Contributors
Topic directory
Math
Geometry
Polygons and Quadrilaterals
Quadrilaterals: Rectangles
Proving a Quadrilateral Is a Rectangle
Read this topic
Explanations
1
Suppose we are given a quadrilateral ABCDABCDABCD. There are several easy ways to prove it is a rectangle. Show that all angles are 90 degrees. Show that one set of sides is par…
By Vincent Huang
Find a topic
Type a concept, like “slope” or “photosynthesis”.
↑ ↓ to choose · Enter to open
Search explanations and problems