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Use Vectors to Find the Measure of the Angle at Vertex

Question 32

Multiple Choice

Use vectors to find the measure of the angle at vertex B of triangle ABC,when A=(5,4) A = ( 5,4 ) , B=(−2,4) B = ( - 2,4 ) ,and C=(−3,−4) C = ( - 3 , - 4 ) .Round answer to two decimal places.


A) 95.94°
B) 98.47°
C) 97.13°
D) 95.04°
E) 99.65°

Correct Answer:

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