Chat with our AI personalities
It is an indicator that the angle formed at that point is a right angle (90 degrees).The small square at the crossing point of two perpendicular lines serves to indicate that the two lines indeed form an angle of 90 degrees.
parallel lines.
Extension lines are generally used in conjunction with dimension lines in technical drawings. They extend from the feature being measured to indicate the start and end points of the dimension. This helps in clearly defining the size or distance between points on the drawing, ensuring accurate interpretation of measurements.
Two white parallel lines indicate that no passing is allowed.
(in the US) They indicate a no passing zone. The white lines indicate multiple lanes of travel in the same direction, while the yellow lines indicate opposing lanes of travel.