It is 77.5. Using a calculator is more useful. ☺
When you reflect a point across the x-axis, the x-coordinate remains the same, but the y-coordinate is transformed into its opposite (its sign is changed). If you forget the rules for reflections when graphing, simply fold your paper along the x-axis (the line of reflection) to see where the new figure will be located.p explanation:
This example is the Symmetric Property.
I hope this helps you!
xo, Leafling
Nice question hey there! need help!?