How do you convert straight-line energy from a piston into circular energy to power a wheel? How does your sunroof open? When you turn your steering wheel, why doesn't one wheel drag as you go around a corner? Use this set of posters to show how geometry can be applied to answer these real-world questions. Set includes a booklet and four posters- Connected Four-Bar Linkages, Linkages in Automobiles, Linkages for Straight-Line Motion, and Parallelogram Linkages. Each poster is 17" x 22".