Use Vectors to Find the Measure of the Angle at Vertex

question 55

Multiple Choice

Use vectors to find the measure of the angle at vertex B of triangle ABC, when . Round answer to two decimal places.

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Definitions:

Normally Distributed

A type of statistical distribution where the data tends to cluster around a central mean, with a symmetrical spreading outwards, resembling a bell-shaped curve.

Sample Size

The number of observations or items selected from a population to participate in a statistical analysis.

Correlation Coefficient

A rephrased definition from KT-15: A numerical index ranging from -1 to 1 that indicates the extent to which two variables have a linear relationship.

Interval Variables

Another term for interval data, indicating variables measured along a scale on which each point is placed at equal distance from one another, with meaningful quantifiable differences but without a true zero.