Can I relate a dimension to another?

francesco_longoni

Example:

the vertical side of a rectangle must be the half of the horizontal so that when I change the horizontal dimension the vertical one will change automatically 

Thanks for your support

bruce_williams

Check out variables

john_mcclary

For simple divisions like half. you can just use geometry instead of a variable.

here you see i created a construction line, made it equal the short edge, then constrained the end point to the mid point of the long edge.

bruce_williams

Check out variables

john_mcclary

For simple divisions like half. you can just use geometry instead of a variable.

here you see i created a construction line, made it equal the short edge, then constrained the end point to the mid point of the long edge.

francesco_longoni

thanks 

I will use your suggestion for this simple action.
In my case I prefer to use variables, I probably made the wrong example to simplify my question.

Thank a lot for the support.