With some found-around-the-house tools and some patience, you can draw perfect archs – just like an architect! This architect, Reza Asgaripour, has some fantastic videos and instagram posts that show you how to draw.
See how to draw an arch here on Instagram: https://www.instagram.com/p/BXxSCNTBbXF/?taken-by=architectdrw
On this YouTube video, you can use string and pushpins to draw a complex 3-D Cube with cutouts. It is spectacular!
Try it out and see if you have some success drawing like an architect.