Dimension - a dimension is something that can be measured - a zero-dimensional object is a point in space. It can't be measured but it had a location -There are three one-dimensional "space dimensions" lengths, width, and depth - Two-dimensional objects have area -Three dimensional objects have volume - Often "time" is called that fourth dimension Length -Length is the amount of distance between two points along a straight line - Length exists in one dimension - Length is like a wire Finding Length - Length is often given in a problem or it can be figured out by using properties of parallel lines and parallelograms - Length between points