570 feet
Drawing perpendicular bisector for a line:Place the sharp end of a pair of compasses at one end of the line, and open it to just over half of the line. Draw an arc which must intersect the line in the position described. Then put the sharp end at the other of the line and, keeping the compassing at the same length, draw another arc which intersects the first one twice and also the line. Then draw a straight line through the two places where the arcs intersect. This line is the perpendicular bisector. Drawing perpendicular bisector of angle:Places the sharp end of the compass at the point of the angle and, after having opened it arbitraily wide, draw an arc which intersects the two lines meeting to form the angle each once in the said position. Then remove the compass and, always keeping it opened at the SAME length, place the sharp end at each of the two places where the previous arc cuts each of the two lines meeting to form the angle. In this position with the described length, draw a small arc at each of the said places, which should cross each other. Draw a straight line from the point of the angle to this crossing. This should be the bisector of the angle.
two lines crossing each other
It's there to show that your crossing into a different country's territory.
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People who have crossed the river separates life from death.
they both have lines crossing each other which make angles. perpendicular lines make right angles while intersecting lines make other kinds
perpendicular lines are similar to intersecting lines because that's what they are. Intersecting lines are two lines that cross each other. Perpendicular lines are the same, two lines crossing each other, just with a more specific rule to have right angles.
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.
At their point of crossing, the space between two crossnig line is 0. From any point on either line you can always drop a perpendicular to the other line and this will be the shortest distance from that point to the other line.
2 Cell divisions. The first, meiosis I, separates the homologous chromosomes after allowing for crossing over. The second, meiosis II, separates each chromosome by splitting them by their telomeres!
In two dimensions the lines would be intersecting lines not perpendicular (I believe this is called transversal, see related link). If you are in three dimensions they would be skew lines, like to jets crossing above you that don't hit each other. One is higher than the other.
A double solid white line separates two lanes of traffic going in the same direction. Crossing a double solid line is prohibited.