When two angles have the same measure, we say that they are ____________

Explanation

If m(∠ ABC) = 30^o and m(∠ GBC) = 30^o, then we can say that ∠ ABC is congruent to∠ GBC

We write it as ∠ ABC ≌ ∠ GBC   

Read symbol ≌ as "is congruent to"