Sketching Lines & Sim Equations - Extension

Four tasks which require students to sketch straight lines, use pairs of simultaneous equations to find the points of intersection and then calculate the area of the triangle formed. Good practice and extension of these topics for an able Year 9 group or GCSE class. Presented without too much scaffolding but with an optional hint for question 4 which requires more thought and care. Could be used as an extension or a homework assignment. Possible extensions include 4 lines intersecting to form an irregular quadrilateral. Answers included.