Make one edge of rectangle parallel to another

Can someone tell me how to make the left edge of this object parallel the angled right edge? image

Sorry, I should have been clearer. I’m trying to get the left side to match the right.

Drag a Tapemeasure guide-line from the right-hand edge,
Snap its final location to the start point of the left-hand edge.
Make another guide-line along the edge which is at the left-hand edge’s end point.
The intersection of the two guide-lines is the new corner…

Deselect everything and activate the Move Tool.
Click on the edges’ vertex nearest this intersection and drag it to snap to the guide-lines intersection.
The right and left-hand edges should now be parallel ?

Delete the unwanted guide-lines…

Are the corners meant to be right angles? Or deliberately not so, but R and L edges still wanted parallel?

This got me there. I did it a little differently but eventually made it.I pulled a guide from the top right-corner, measured the distance from where it intersected the bottom edge and then moved the bottom left corner in that distance. It worked but if there’s a better/faster way please let me know.


Whoever said ignorance is bliss wasn’t trying to learn 3d modeling. Thanks for giving me some of your time.

Why not make the axes of the component match its orientation? That way, its bounding box will fit tightly round it.

Do what Dave showed you, but first delete the L edge, then copy the R edge to the left, along whichever of top and bottom edges is the right length. This may leave a hole in the shorter horizontal edge, or a piece left over on the longer edge. Redraw the first, and trim off the surplus on the second.

Well, if we’re being totally honest, I don’t know enough yet to know what you just asked/suggested.

Just read the words, and take them a step at a time.

If you haven’t already, see learn.sketchup.com and follow the SketchUp Fundamentals series of videos.

The steps in more detail:

  1. Delete the left edge. Use the Erase tool (shortcut e), or select and tap the Del key (Backspace on Mac).

  2. Select the R edge. Use Move/Copy (m shortcut, then tap Ctrl (Windows) or Option/Alt (Mac) to show a + sign next to the Move cursor). Start the move at the end of upper or lower edge, finish at the other end.

  3. Depending on whether the shorter or longer edge is the right length, you will either leave a gap in one edge, or a piece left over on the other.

  4. If one edge is too short, delete it and redraw it with the Line tool.

  5. If the other edge is too long, select and delete or Erase the short overlap.

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Why not just rotate tool + down arrow

If you do that, the top and bottom edges won’t stay parallel.

There’s something very odd with that shape, but it’s hard to say what is going on without seeing the file. It looks like the bottom edge should run along the green axis but it doesn’t. Is it actually a square/rectangle or a parallelogram? If it’s the former, it would probably have been better to start over, drawing the square/rectangle vertical or horizontal and then rotating it as required.

This forum is a mine of information. It’s probably better to tell people what you were aiming for originally rather than trying to fix a problem that has arisen. That is because there may have been a better way to start with and so avoid bad habits.

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Awesome - I would have taken years to notice that if I hadn’t asked haha

Hi folks.

Another method.

Parallel lines.skp (78.3 KB)

I do appreciate it. The main thing I’m struggling with (aside from all of it) is dealing with the axis/orientation of objects. I’m still watching videos etc. Thanks for the suggestions though.

I want to play too… lots of ways to skin this particular cat. It does look off axis in the screen shots or perhaps not 90˚ corners. Hard to tell quite what’s going on there.