Triangle to right

Maybe I’m clueless, but every time I want to insert a triangle, the only shape I see in the Shape Inspector is Triangle to Right, which is an odd orientation for a triangle. I can turn it 270 degrees so the apex is at the top, but then when I want to set the size in the Geometry section, the width and height are reversed, so I have to remember to put the height in the width box and vice versa. If I want to flip it vertically or horizontally it doesn’t respond the way I expect. Is there a way to create a triangle shape that is not “Triangle to Right”?
Peter Wilson