How does the Triangle relate to the Circle?

     One of the active promoters of poetry with links to mathematics is Californian Carol Dorf -- who teaches math at Berkeley High School AND is poetry editor for the online journal, TalkingWriting.  Along with several other mathy poets, Carol participated in the poetry reading at the Bridges 2017 Math-Arts Conference in Waterloo, Ontario.
     Here, playing with mathematical language -- from Carol's 2013 collection, enchantingly illustrated by Terri Saul, Every Evening Deserves a Title (Delirious Nonce, Berkeley, CA) -- is "Euclidean Shivers."

     Euclidean Shivers     by Carol Dorf

     So, how does the Triangle
     relate to the Circle?    

     Euclid and a radius prove points
     that radiate from the center, a circle,
     a method to navigate space.