About This Lesson
<p>Four rods are hinged at their ends to form a convex quadrilateral. Investigate the different shapes that the quadrilateral can take. Be patient this problem may be slow to load.</p>
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Another nice math problem from N-rich. Complete with teacher notes, hints for the pupils and the solutions already written out for you, all you have to do is introduce the investigation to your pupils and follow the instructions. Looks at a variety of different topics including sine and cosine rules, inequalities and angles in quadrilaterals.