The curve between two points is known as an arc. Arcs and circles are used extensively in geometry. They are used in the real world by engineers and digital artists.
It is a straight line joining two different points on a curve which does not cross the curve between those two points.
... is called a Great Circle arc.
If you take two distinct points on a curve, the arc is the part of the curve connecting the two points while the chord is the straight line connecting them.
A chord is a line segment between two points on a given curve. Basically it's two points that are connected with a line which all happens to be on a curve. Most likely a circle
Is the integral of the curve - between the two end points.
A straight line that intersects a circle or curve at two points, but which has both end points outside the circle or curve is called a secant. A straight line that links two points on a circle or curve is called a chord. A straight line which touches a circle or curve at one point is called a tangent. A straight line that cuts a circle or curve at one point is a straight line.* For moving diagrams see Related links below this box.
MRS of 12,3 and 6,9
A continuous curve surrounding two points will be called an ellipse. Very strictly speaking, the ellipse, circle, etc is the bit inside the curve. e.g. " a circle is bounded by ... "* * * * *Even more strictly speaking, it is any closed curve around two points - it could wobble all over the place.
An arc is part of the circumference of a circle
The shortest distance between any two points is called displacement.
A part of a circle between two points on a circle is called is called an arc.
The distance between two points is called the "distance" or "Euclidean distance" in geometry.