Vocabulary - 2D Shapes

The vocabulary list provided is a comprehensive collection of terms related to 2D shapes, essential for KS2 learners. It starts with the basic terminology of a '2D shape', indicating a two-dimensional figure with length and width but no depth. 'Circle' and 'circular' refer to a round shape with a consistent curvature from the centre to any point on its edge, while a 'semi-circle' is half of a circle. The list moves on to 'triangle' and 'triangular', describing a shape with three straight sides and three angles, and then to 'square' and 'rectangle', both four-sided shapes with the former having equal sides and the latter having opposite sides of equal length.

Further expanding the vocabulary, 'rectangular' pertains to the shape of a rectangle, and 'star' describes a multi-pointed figure often with five or more points radiating from the centre. 'Pentagon' and 'pentagonal' refer to a five-sided shape and its related adjective. The list continues with 'hexagon' and 'hexagonal' for six-sided shapes, 'octagon' and 'octagonal' for eight-sided figures, and 'quadrilateral' for any four-sided polygon. Terms like 'equilateral triangle', 'isosceles triangle', and 'scalene triangle' differentiate triangles by the lengths of their sides, while a 'right-angled triangle' has one 90-degree angle. 'Oblong' and 'heptagon' describe a rectangle with unequal adjacent sides and a seven-sided shape, respectively. 'Polygon' is a term for any multi-sided figure, and 'horizontal', 'vertical', and 'perpendicular' describe orientations or relationships between lines. Finally, 'parallel' and 'parallelogram', 'rhombus', 'trapezium', and 'diagonal' round off the list with terms relating to specific shapes and the properties of their sides or angles, while 'centre' denotes the middle point of a shape.