Defining and Drawing Points

• Rectangular coordinates: (1,2)
• Named Points: \coordinate (A) at (1,2)
• Polar coordinates: (90: 2)
  PS! Default: angles in degrees
• Convex combination of \(A\) and \(B\): ($(A)!0.t!(B)$): $$P=t A+(1-t)B, \quad t \in \mathbb{R}$$
• Algebraic expressions: ($0.5*(A)-0.5*(B)$)