Objects

The definitions below will only work for you if you are comfortable with words like “size”, “location”, “collinear”, “opposite”, “equidistant” and a few others.

We can’t define angle. We can only show

We will define a few Objects here and admit that there are others that could later be of importance.

Point – An object that has a location but no size.

Line Segment – A line segment is a collection of collinear points between two specified points.

Ray – A collection of colinear points that starts at a given location and extends infinitely in a specified direction.

Line – A collection of collinear points that extend infinitely in opposite directions.

Angle – we can’t define angle. We can only show you two rays with a common origin and tell you that there is a number that measures their separation. We might tell you that at 3 O’Clock the angle between the hands is 90 degrees, at 4 O’Clock the angle between the hands is 120 degrees, and that the full circle, from 12 all the way around back to 12, is 360 degrees–and then after all this we hope you understand “degrees” and if so, then we say an angle is the measure of degrees.