Learning Objectives: By the end of the lesson, students should be able to calculate the angle of slope and angle between two lines.
Reference Materials: New Further Mathematics Project 2 by M. R Tuttuh Adegun
Previous Knowledge: Students can draw the graph of a linear equation (straight-line graph).
Instructional Materials: Graph board and graph book.
Content:
ANGLE OF SLOPE
Example: Find the gradient of the line joining (3, 2) and (7, 10) and the angle of slope of the line.
Solution
Let m be the gradient of the line, then
m = (10-2)/(7-3) = 8/4 = 2
Let θ be the angle of slope of the line; then:
tanθ=2
θ=63.43°
ANGLE BETWEEN TWO LINES
EQUATION OF A LINE
The equation of a straight line is given by: y =mx + c
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