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# Vectors

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### Vectors

1. 1. Vectors
2. 2. • A vector is a quantity that has both length and direction.• The vector below may be named or
3. 3. • A vector can also be named using component form. The component form 〈x, y〉 of a vector lists the horizontal and vertical change from the initial point to the terminal point. The component form of CD〈2, 3〉.
4. 4. • The magnitude of a vector is its length. The magnitude of a vector is written  or  . AB v• Finding the Magnitude of a VectorStep 1 Draw the vector on a coordinate plane.Use the origin as the initial point.Step 2 Find the magnitude. Use the DistanceFormula.
5. 5. • The direction of a vector is the angle that it makes with a horizontal line. This angle is measured counterclockwise from the positive x-axis.• Finding the Direction of a VectorStep 1 Draw the vector on a coordinate plane.Use the origin as the initial point.Step 2 Find the direction.
6. 6. • Two vectors are equal vectors if they have the same magnitude and the same direction.• Two vectors are parallel vectors if they have the same direction or if they have opposite directions.
7. 7. • The resultant vector is the vector that represents the sum of two given vectors.
8. 8. • Vector AdditionHead-to-Tail MethodPlace the initial point (tail) of the second vector onthe terminal point (head) of the first vector. Theresultant is the vector that joins the initial point ofthe first vector to the terminal point of the secondvector.
9. 9. Vector AdditionParallelogram MethodUse the same initial point for both of the givenvectors. Create a parallelogram by adding a copy ofeach vector at the terminal point (head) of theother vector. The resultant vector is a diagonal ofthe parallelogram formed.