No, it is not correct. There is no equal sign, so the expression is not an equation.
D is a line, K is a point, beta is a plane and PY is a line segment.
Try demonstrating by drawing a circle ( day it’s a pizza) and cutting it into 8 pieces. Then as you go shade in the pieces to represent eating the pizza. hope this helped : )
(meter = kilometer) / second =1 kilohertz