Let A = (-5, 2), B = (1, 0), and C = (4, 9). Prove that AABC is a right-angled triangle. Let u = AB, v = BC, and w = AC. We must show that u · v, uw, or v w is zero in order to show that one of these pairs is orthogonal. U. V = U. W = V.W = Based on your previous answers, it can be concluded that AABC is a right-angled triangle because of which of the following? O AB L BC OBCI AC O AB AB L AC

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A: ai + bj + ci + dj = (a+c)i+ ( b+d)j

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A: Given that: v.w = 0

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Q: Determine whether v = -2i + 3j, w = -6i - 9j are parallel, orthogonal, or neither.

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