1. Intersection of Straight Lines Solving simultaneous equations 8.

2. Intersection of Straight Lines Copy the following: The point of intersection of straight lines is the point where they cross: Point of Intersection To find the point of intersection we must solve the simultaneous equations created from the equations of the lines

4. Example 1 Find the coordinates of the vertices of the triangle whose sides have the equations: x = 2 x + y = 6 3x + 4y = 21 Solution : 3. Take the final pair of equations and solve to find vertex 3 - - - Sub y = 3 into x + y = 6: 4. Make a statement Vertices of traingle are (2 , 4) and (3 , 3)

5. (2 , 4) (3 , 3)

6. Homework booklet, Exercise 8