Exactly in the same way as using the formula for any straight line between two points which is:-
Square root of [(x1-x2)squared+(y1-y2)squared]
Just subtract the y coordinate of the lower end of the segment from the y coordinate of the higher end.
Subtract the y-coordinates of the points and take the absolute value
a chord
line segment
A chord is a line which connects two points which lie on a circle.
A chord. ■
Subtract the y-coordinates of the points and take the absolute value
A vertical line goes straight up an down, so a vertical line segment is a line segment that goes straight up and down. Simple.
Add the x-coordinates of the points and take the absolute value
a line segment
a chord
line segment
A chord is a line segment which connects any two points on a circle.
A chord is a line which connects two points which lie on a circle.
A chord. ■
A chord.
Subtract the x-coordinates of the points and take the absolute value. Using the Pythagorean Theorem, the y-value would be zero, and the distance the square root of its own square.
A chord. If it's not a segment, it's a secant line.