Two transformations will be applied to triangle RST so that its final image is also located in Quadrant 1. The second transformation will be a reflection across the Y-axis. Which transformation could be the first transformation applied to triangle RST? 1. a rotation 90 degrees counterclockwise about the origin
2. a translation 6 units to the right
3. a reflection across the x-axis
4. a dilation by 1/2 about the origin

Nina has prepared the following two-column proof below. she is given that ∠oln ≅ ∠lno and she is trying to prove that ol ≅ on. triangle oln, where angle oln is congruent to angle lno step statement reason 1 ∠oln ≅ ∠lno given 2 draw oe as a perpendicular bisector to ln by construction 3 ∠leo ≅ ∠neo transitive property of equality 4 m∠leo = 90° definition of a perpendicular bisector 5 m∠neo = 90° definition of a perpendicular bisector 6 le ≅ en definition of a perpendicular bisector 7 δole ≅ δone side-angle-side (sas) postulate 8 ol ≅ on cpctc nina made two errors in the proof. identify and correct the errors.