Our reader, noman1, asked about drawing a pair of opposing arches. The video shows one way to draw them. The method is slightly more involved than it might be but it isn’t at all difficult. These arches are taller than half the length on the ground plane. Drawing the initial arc using the arc tool and drawing the arc to the final dimensions would yield a sort of bulging arc as shown in brown, below.
I didn’t like the shape of that arc for this application so I decided to use another approach to get an arc as show in orange in the next image.
I think the shape works a bit better for this project.