cattycorner
/ˈkatɪˌkɔrnər/Definitions
1. adverb
At a right angle to each other; in a position where two lines or surfaces intersect at a 90-degree angle.
“The two tables were set up cattycorner in the large meeting room.”
2. noun
A position or arrangement where two things are at right angles to each other.
“The chairs formed a cattycorner shape around the patio.”