What do i do? and what is the answer?

Which math sentence can be used to determine if the triangle is a right triangle?

(mc 02.03) what set of reflections and rotations would carry rectangle abcd onto itself? reflect over the y-axis, reflect over the x-axis, rotate 180° rotate 180°, reflect over the x-axis, reflect over the line y=x reflect over the x-axis, rotate 180°, reflect over the x-axis rotate 180, reflect over the y-axis, reflect over the line y=x

Will give brainliest immeadeately true or false: the origin woud be included in the solution set for the inequality: y< 2x-5