Figure rst is reflected about the y-axis to obtain figure r’s’t’:

a coordinate plane is shown. triangle rst has vertices r at negative 5 comma 1, s at negative 6 comma 4, and t at negative 1 comma 5. triangle r prime s prime t prime has vertices r prime at 5 comma 1, s prime at 6 comma 4, and t prime at 1 comma 5.

which statement best describes the relationship between the two figures?

figure rst is bigger than figure r’s’t’.
figure rst is congruent to figure r's't'.
the measure of angle r is equal to the measure of angle s’.
the measure of angle r is equal to the measure of angle t’.