Cards In This Deck

• $\text{How do you find the point of intersection of two lines, e.g., }y=2x\text{ and }x+y=6\text{?}$
  $\text{Solve them as simultaneous equations.}$
• $\text{Formula for the distance }d\text{ between two points }(x_1,y_1)\text{ and }(x_2,y_2)\text{.}$
  $d=\sqrt{(x_2-x_1{)}^2+(y_2-y_1{)}^2}$