I'm going to show you three ways you can Make a triangle in InDesign Select the polygon tool and change the Width and height to four number of sides Should be three and the start inset Should be zero percent The second method is to take the Rectangle tool and then use the pen tool And click on one of the corners to make A right triangle for our last method if You want to change any shape into a Triangle all you have to do is go up to Object convert shape triangle subscribe To envato tips Plus for More Design tips