Pamoja Education IB Mathematics HL; Unit 9, Week 44: Intersection of Planes; Blog Post: Create the Scenario Scenario 5: Create 3 planes such that all 3 planes contain the line [i]r = (1, 2, -1) + t(2, 1, 1)[/i] Use the 'Rotate 3D Graphics View' tool to look at the planes from different angles. Enjoy!