LEARNING OBJECTIVE: Use the Scalar product to find the angle between two lines and use tha scalar product to determine whether two lines are perpendicular or not.
SUCCESS CRITERIA: You will be able to find the angle between two lines and decide whether two lines are perpendicular or not.
LESSON: Work through this lesson (vey slowly!) using the examples for students to practice on.
If time have a look at Example 28 in Text book on page 73
Have a go at Ex 5G pages 74 & 75
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