Detailed solution to Problem Set 32 Exercise 3

Question:
Find the area of a triangle if two of the vectors along its sides are ⟨−2, 3⟩ and ⟨4, 6⟩.
Solution:
½|⟨−2, 3⟩ × ⟨4, 6⟩| = ½|(−2)(6) − (3)(4)| = 12.

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