In Exercises 17 and 18, consider RSTV with VX | RS and VY 1 ST. 17. a) Which line segment is the altitude of RSTV with respect to base ST? b) Which number is the height of RSTV with respect to base ST? 18. a) Which line segment is the altitude of RSTV with respect to base RS? b) Which number is the height of R 16 12 15 20 Exercises 17, 18 RSTV with respect to base RS?