Points P, Q, and R are located on the coordinate plane, and n represents an integer. • The coordinates of point P are (n, 3). • The coordinates of point Q are (0, 3). • The coordinates of point R are (n, –2). • The distance from point P to point Q is equal to the distance from point P to point R.

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?