## Question

###### Find the measure of the acute or right angle formed by intersecting lines so that $C$ can be mapped to $\mathrm{C}^{\prime}$ using two reflections. The rotation $(\mathrm{x}, \mathrm{y}) \rightarrow(-\mathrm{x},-\mathrm{y})$ maps $\mathrm{C}$ to $\mathrm{C}^{\prime}$

Find the measure of the acute or right angle formed by intersecting lines so that $C$ can be mapped to $\mathrm{C}^{\prime}$ using two reflections. The rotation $(\mathrm{x}, \mathrm{y}) \rightarrow(-\mathrm{x},-\mathrm{y})$ maps $\mathrm{C}$ to $\mathrm{C}^{\prime}$

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