Choose all that are true for two congruent triangles δabc and δdef. ∠b is congruent to ∠e ac is congruent to df ab is congruent to ef ∠a is congruent to ∠f

Shape a is congruent to shape , as shown by a reflection across the y-axis and then a translation down units. shape b is congruent to shape , as shown by a reflection across the y-axis and then a translation down units.