Find the measure of the acute or right angle formed by intersecting lines so that C can be mapped to C' using two reflections. The rotation (x, y)→(y, -x) maps C to C'.

Find the measure of the acute or right angle formed by intersecting lines so that C can be mapped to C' using two reflections. The rotation $(x,y)\to(-x,-y)$ maps C to C'. The measure of the angle is $\square^\circ$.

Last year, the track team's yard sale earned $500. This year, the yard sale earned$625. What is the percent of increase?

Tell whether the statement with always, sometimes, or never true. Explain your reasoning. The composition of two reflections results in the same image as a rotation. Explain your reasoning.

Complete the sentence. If P(x, y) is the preimage of a point, then its image after a dilation centered at the origin (0, 0) with scale factor k is the point _.

Use the Reflection in Parallel Lines Theorem to explain how you can make a glide reflection using three reflections. How are the lines of reflection related.