[size=150]1)  Drag  point  P  to  the  desired  position  or  randomly  set  it  on  x,  y  or  z-axis.[br]2)  Select  the  coordinates  changing:  Cartesian→polar  or  polar→Cartesian.[br]3)  Write  your  answer  and  check  it  clicking  on  the  “confirm”  box.[br]4)  If  your  answer  is  wrong  watch  the  solution  by  ticking  “explanation”.[/size]

[size=85][size=150]Test yourself on up to 10 exercises of your choosing...[br] and[br]watch your score update as you complete the test...[br][br]If you are not satisfied with your final score press the "reset test" button and try again...[br][br]Good fun...[/size][/size]