Properties of 2D shapesOnline version When looking at a group of shapes with straight sides, learners group them according to the number of sides. For example closed shapes with straight sides are called polygons. by Matt Wesley 1 Closed shapes with straight sides are called ? Written answer 2 All closed shapes with 4 straight sides are called Written answer 3 What shape has 4 equal sides? Written answer 4 What shape has 2 sets of 2 equal sides? Written answer 5 What shape has almost infinite axes of symmetry going through the centre? Written answer Feedback 1 polygon 2 Quadrilateral