Parallel close parallel Parallel lines are always the same distance apart. They never meet. lines have the same gradient close gradient A measure of the slope of a line.. Higher - Perpendicular ...

This KS2 maths article explains how parallel lines are always the same distance apart and never meet. A perpendicular line is at right angles to another line.

From four-dimensional hexagons to the mind-bending amplituhedron, geometrical shapes are wilder than we learn at school - and ...

Crows are considered to be among the smartest creatures on Earth. They have cognitive abilities at the levels of five- to ...

The calculated flow geometry consists of flow lines that are parallel to the trench near the shallow dipping slab and trench-perpendicular directly above the shallow dipping slab.