Two straight lines that meet at right angles are perpendicular.
perpendicular
To get a building square the Romans used the the groma and the set squares (L-shaped tools used to check the angle of the brickwork). The groma surveying instrument originated from Mesopotamia which was adopted by the Greeks in the 4th century BC, who then introduced it in Italy. It was a wooden vertical staff with two horizontal bars mounted at the top at right-angles with a bracket. Plum lines hung from the two ends of each bar. It allowed to survey straight lines and right-angles, to calculate squares or rectangles.
Thales is credited with five propositions, which were guidelines for the development of geometry. 1) Any angle inscribed within a semicircle is a right angle (90 degrees). (Thales's' Theorem) 2) A circle is bisected by its diameter. 3) An isosceles triangle has two sides of equal length. the two angels opposite those sides are equal to each other. 4) When two straight lines cross each other, they form four angles. The angles opposite each other will be equal. 5) Two triangles are equal in all respects if they have two angles and one side that equal those in the other triangle.
Crosshatching is an extension of hatching, which uses is the use of fine parallel lines drawn closely together, to create the illusion of shade or texture in a drawing. Crosshatching is the drawing of two layers of hatching at right-angles to create a mesh-like pattern. Multiple layers in varying directions can be used to create textures. Crosshatching is often used to create tonal effects, by varying the spacing of lines or by adding additional layers of lines. Crosshatching is used in pencil drawing, but is particularly useful with pen and ink drawing, to create the impression of areas of tone, since the pen can only create a solid black line.
it means juncture
Polyphonic.
Perpendicular lines meet at right angles
They are mutually perpendicular lines.
perpendicular
If they intersect and form right angles, they're perpendicular.
They do not meet at right angles to one another.
Two lines that meet at a right angle are called perpendicular.Two lines that meet at a right angle are also called normal.Two lines that meet at a right angle are also called orthogonal.
coordinate plane
That would be two perpendicular lines.
Angles in the straight line
two lines that are perpendicular form right angles
The parallel postulate: "That, if a straight line falling on two straight lines make the interior angles on the same side less than two right angles, the two straight lines, if produced indefinitely, meet on that side on which are the angles less than the two right angles."
Its Impossible. For there to be a shape where all five lines meet perfectly and there to be two pairs of perpendicular sides, there must three right angles. Alternitavely, you could have 1 pair of perpendicular lines and two rights angles, but certainly not both.