Both.
http://www.mathopenref.com/anglesvertical.html
http://drdavespsychologypage.intuitwebsites.com/Decision_Trap.pdf
Anita says that a Plus sign + forms 2 pairs of veritcal angles Charles says it forms 2 pairs of congruent angles who is correct? explain
2 answers
they both are becuz the plus sign forms vertical angles and vertical angles always congruent.