In this way you can check an angle across the diagonal of the room, or the partial diagonal.
Step 1: Click Check, and then click Check Angle.
Step 2: In the floor plan, select the angle to be checked.
Step 3: Measure the corresponding diagonal between the walls where the angle is located. You can also measure the partial diagonal if the diagonal cannot be measured.
Step 4: Type the maximum value of the diagonal manually in the Diagonal field and the new angle value will be calculated automatically.
Step 5: Click on the blue check mark at the top right to end the command. The floor plan is automatically redrawn with the new angle.