: Merging a semicircle with two parallel lines How can I merge a semicircle with two parallel lines? I want to have the leftmost point of the semicircle to bind with the leftmost line in the

@Berumen635

While Scott's answer is excellent and simple, it's sometimes a hassle to align the arc and the lines. That's why I thought I'll suggest a different approach, which I admit can also be a hassle. But another perspective never hurts. I've used your image as an example. The letters between parenthesis indicate the keyboard shortcut.


Make a rectangle that has the same heigth as the distance between the two parallel lines and rotate it such that it fits the image:

Delete the lower line with the Direct Selection Tool (A).

Cut the lines with the Scissors Tool (C) at the appropriate place by clicking on the place where you want to make the cut. Delete the unnecessary parts of the line.


Measure the width of the rectangle, i.e. the distance between the two parallel lines. The Measurement Tool is found under the icon of the Eye Dropper Tool. Drag from point 1 to point 2 and read out the distance marked by D. In this case it's 340px.


Select the rectangle (or what's left of it) with the Selection Tool (V). Go to Effect -> Stylize -> Round Corners. Type in 340/2 as the radius:

And this is your result:



Nice thing is that this scales as you scale the "rectangle" and you can change the radius later on by going to the Appearence pane and clicking on the underlined Round Corners link.

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@Si6392903

Looks like you are trying to recreate paths from a scan. I've had to do this more times than I care to admit. Try this:



If you can't read the image, the steps are:


Draw the circle
Draw a rectangle, snapping the corners to the nodes on the circle.
Select both, rotate around the center of the circle
Pathfinder > Weld

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@Murray976

Align the end anchors using the Direct Selection Tool (the white arrow), select the aligned anchors (still using the Direct Selection Tool), and then choose Object > Path > Join from the menu.

Or you could simply use VectorScribe's Dynamic Corners tool on a rectangle...



Note: I am not compensated for mentioning VectorScribe.

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