Fillet

Rounds and fillets the edges of objects

Home tab > Modify panel > Fillet

Command line: Radius

Specify fillet radius: 200

Pick the 1st line

Hover cursor over the 2nd line to preview the result

Click on the line to confirm the fillet

No Trim option

Start the Fillet command

Command line: Trim

Select No trim

Pick 1st line

Hover cursor over 2nd line to preview then click the line to confirm

Multiple option

Start Fillet command

Change back to Trim

Command line: Multiple

Continue to pick lines on the 2 corners to fillet

Polyline option

Start Fillet command

Change the radius to 300

Command line: Polyline

Hover cursor over the polyline to preview

Click the polyline to confirm the fillet

Parallel Line

Start Fillet command

Pick the 1st line
Hover over 2nd line to preview

Continue to pick all the parallel lines

Zero Fillet

Start Fillet command

Pick 1st line

Shift + Select the 2nd line

Repeat the same steps on the other corner

Polyline Arc

Draw the polyline with arc

Start Fillet command

Select the line

Select the arc