# line

Home/Tag: line
29 07, 2017

## Tangents – trigonometry – math

Tangents: This line is tangent to a circle. What is a tangent? A tangent, like a sine or a cosine, is a mathematical way of thinking about a kind of movement that happens [...]

29 07, 2017

## Solids – Platonic solids – Geometry

Pyramid Just as a plane is made of an infinite number of lines, a solid is made of an infinite number of planes. These planes are right next to each other, like [...]

29 07, 2017

## What is skew? Skew lines – Geometry

These two green lines are skew to each other. Skew is a pretty cool word, and it sounds like it means something really weird, and it kind of does. It [...]

29 07, 2017

## Rectangle – area and perimeter

This is a rectangle. A rectangle is a flat shape, in one plane. It's defined by four points at the four corners. A rectangle has two sides of equal length opposite each other, [...]

29 07, 2017

## Perpendicular lines – Simple geometry

Perpendicular lines Two lines are perpendicular if they cross at right angles. You can test this by extending the lines until they cross (if they do not cross then they are parallel). Where the [...]

29 07, 2017

## Parallel lines – Simple geometry

Two parallel lines Two lines are parallel if they are in the same plane but they can go on forever without ever crossing. You can test this by seeing if you can [...]

29 07, 2017