You might find it easier to start by drawing a large rectangle on the ground plane. Then draw the arcs so they are laying on the face of the rectangle. With practice you’ll find you don’t need the face but starting out, it’s often easier. As for making the curves tangent to each other, that’ll have to do with where you start the arc and how far you pull it out. If you have some way to identify and locate the centers of the arcs, you might find the Arc tool easier than the 2-Point Arc tool.
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