I know all the four lengths of a flowerbed, but no angles. How can I draw it in SketchUp?

I can draw one line with a specific length. Then I can draw the next line with a specific length, but I do not know the angle, so I draw it approximately. Then I draw the third line.

Then I tried to adjust the lines by moving the third vertice, but only the second line stays the same length (and the same angle), both the 1st and 3rd lines get their distances and angles adjusted to keep them connect to the moved 2nd line, and to keep their other (non-connected) vertices stationary.

So, I cannot move anything without disrupting the specified line lengths, which actually are what I know for sure and need to keep intact. But SketchUp decides other things to keep intact.

And this is even before I try to add the fourth line, which should eventually connect the whole shape.

So, is it even possible to draw such quadrilateral without knowing angles, or do I have to use geometry and calculate the angles, and then set specific angles when Iām drawing the lines?