A cross section is the shape formed when a plane intersects a three-dimensional figure. Imagine slicing through a solid object with a knife; the shape of the slice is the cross section. Understanding ...

A prism is a 3D shape which has a constant cross section - both ends of the solid are the same shape and anywhere you cut parallel to these ends will give you the same shape. For example, in the prism ...

2D shapes are flat, plane shapes. Triangles have three sides and three angles that add up to 180°. Quadrilaterals have four sides and four angles that add up to 360°. Constructing triangles Learn how ...