draw a line segment AB=6cm take a point C on AB such that AC= 2.5 cm draw CD perpendicular to AB ?

3 answers

And then what? How long should you make CD?
You have only described where to make it perpendicular to AB, and how long AB is.

We can't draw figures for you
There is no question here just instructions to draw. If you need to do this on paper then use a pair of compasses. Draw AB as a 6 cm line. Set the pair of compasses to 2.5 cm and mark C on the line by using the pair of compasses (point at one end of the line and mark C with the pencil). Now use the compasses at 2.5 cm to generate the perpendiculat line by marking an arc either sideof the line AB. Go to the other end of the line and with the pair of compasses set at 3.5 cm draw another arc either sideof the line AB. These two arcs will intersect. Draw a line between the two points of intersection - this line should cross the AB line at 2.5 cm and will be perpendicular to the line AB
Huhkook