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Determine the Angle Between Vectors Using the Dot Product
Worksheet
Grade Level
Pre-Calculus
Pre-CAL.140 Determine the Angle Between Vectors Using the Dot Product
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A student computes u·v = -5 for two nonzero vectors u and v and concludes, “They are perpendicular.” Which response is best?
A
Correct, because any negative dot product means 90°.
B
Correct, because the dot product is not 0.
C
Incorrect, because negative dot product means the angle is acute.
D
Incorrect, because perpendicular vectors must have dot product 0.
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