2D Shapes - Terminology
There are some words and symbols that are used when describing shapes that your child needs to know to be able to work with 2D and 3D shapes.
Lines that are the same distance apart along their length are said to be parallel. They do not have to be the same length and can even be curved. They just have to be the same distance apart and never meet - like a railway track.
When lines are parallel we use the > (or >> if there are two sets) to show that the lines with this symbol on them are parallel to each other.
Right Angle / Perpendicular
This symbol shows that the angle is 90° or a Right Angle
It two lines are at 90° to each other, they are said to be perpendicular
Line CB is at right angles to Line BD Line CB is perpendicular to Line AD
Lines of Same Length