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kite anchor launch

lay out lines perpendicular to the wind direction, attach chicken loop to the kite anchor leash, inflate kite and place on beach on the upwind side of the lines 1/2 way down the lines, attach kite lines to kite, flip kite over and walk out so the leading edge is into the wind, stand kite up on its wind tip so the kite lines are tight and being held by the kite anchor, walk to anchor, attach safety leash to control bar, attach chicken loop to harness hook, detach kite anchor leash and launch the kite -- repeat the process in reverse to land the kite.

Author: kitebdr
Keywords: kitebdr
Added: January 8, 2009


Tube End Facing machine / Squaring Machine, presented by LEFON

LEFON SquareDevil3.0, the portable tube squaring machine/facing machine is specially designed to flatten thin wall tube end, making it burr-free, and perfect perpendicular to the axis of the tube. After squaring, the tube would be ready for orbital welding or other tube fabrication, ideal for high purity / high sanitary industry use, such as Beverage, Dairy, Pharmaceutics, Water treatment, Food, Semi-conductor industry etc. Key Feature: * Faces most metals including stainless steel, nickel and carbon steels * Wide range of collets(clamp) available, to work on tube with OD from ¼ to 3. * High quality collets made from stainless steel rather than aluminum * Can face tube wall thickness up to 3mm * 120/220 V powerful Metabo electrical motor * Micro feed system * Full range of drill bit available http://www.lefonmachine.com

Author: lefonpipecutter
Keywords: squaring machine
Added: January 7, 2009


~Tale Of Progress~

another song I wrote..not sure if I like this one better but oh well Lyrics, ~Tale of progress~ Angels overhead and demons beside, They want to ruin the life inside, Steadily you stand perpendicular, Always across from but never crossing her, Watching the pain on her face, Amazed that disturbia is grace, Hiding eyes from reflection, Avoiding weight of. All thats in the past, The memories that last, Haunting sounds of laughter, Dont you know what shes after. A stoke of luck forever searching for, She doesnt want to but tries once more, You watch as she gives her all, Then become the reason she has to fall, Inflect more pain, To keep her from becoming sane, Because its beautiful to you, To see the pain she goes through, All the pain brought back from the past, Relieving the memories at last, Ruining the sounds of laughter, Keep her searching for what shes after, Shes leaving you behind, To herself she tries to be kind, Surrounding herself with lucky days, Even with the hurt that stays, Ohh ohh ohh Its time to let go, Wash away the stains rubbed deep, Demand a peaceful sleep, Moving on from the past, Found the light at last, Loving the sounds of her laughter, luckily she found what she was after.

Author: haleyg91
Keywords: Haley*G
Added: January 6, 2009


Parallel or Perpendicular? Courtesy Of Mr. Naff Nick

Confused what parallel and perpendicular means? watch this.

Author: sam93d
Keywords: Mr. Nicholas Hartshill school maths funny naff nick mc. mc
Added: January 5, 2009


Perpendicular Refractions

Sad piano song in G Minor. I wrote all the notes by hand (didn't play it obviously) so there is no sequencing here. Only loops once though. Probably need to fix the ending.

Author: MeteoXavier
Keywords: Sad piano solo piano
Added: January 4, 2009



More Information About Perpendicular

In geometry, two lines or planes (or a line and a plane), are considered perpendicular (or orthogonal) to each other if they form congruent adjacent angles. The term may be used as a noun or adjective. Thus, referring to Figure 1, the line AB is the perpendicular to CD through the point B. Note that by definition, a line is infinitely long, and strictly speaking AB and CD in this example represent line segments of two infinitely long lines. Hence the line segment AB does not have to intersect line segment CD to be considered perpendicular lines, because if the line segments are extended out to infinity, they would still form congruent adjacent angles.

If a line is bending to another as in Figure 1, all of the angles created by their intersection are called right angles (right angles measure ½π radians, or 90°). Conversely, any lines that meet to form right angles are perpendicular.

In a coordinate plane, perpendicular lines have opposite reciprocal slopes. A horizontal line has slope equal to zero while the slope of a vertical line is described as undefined or sometimes ±infinity. Two lines that are perpendicular would be denoted as ABC DEF .

Contents

Numerical criteria

In terms of slopes

In a Cartesian coordinate system, two straight lines L and M may be described by equations.

L:y = ax + b,
M:y = cx + d,

as long as neither is vertical. Then a and c are the slopes of the two lines. The lines L and M are perpendicular if and only if the product of their slopes is -1, or if ac = − 1.

The angle times the height of another angle equals the sum of one angle. The perpendicular force is equivalent to the base and also the height of the vertex/reflex angle(s).

Construction of the perpendicular

Fig. 2: Construction of the perpendicular (blue) to the line AB through the point P.

To construct the perpendicular to the line AB through the point P using compass and straightedge, proceed as follows (see Figure 2).

  • Step 1 (red): construct a circle with center at P to create points A' and B' on the line AB, which are equidistant from P.
  • Step 2 (green): construct circles centered at A' and B', both passing through P. Let Q be the other point of intersection of these two circles.
  • Step 3 (blue): connect P and Q to construct the desired perpendicular PQ.

To prove that the PQ is perpendicular to AB, use the SSS congruence theorem for triangles QPA' and QPB' to conclude that angles OPA' and OPB' are equal. Then use the SAS congruence theorem for triangles OPA' and OPB' to conclude that angles POA and POB are equal.


In relationship to parallel lines

Fig. 3: Lines a and b are parallel, as shown by the tick marks, and are cut by the transversal line c.

As shown in Figure 3, if two lines (a and b) are both perpendicular to a third line (c), all of the angles formed on the third line are right angles. Therefore, in Euclidean geometry, any two lines that are both perpendicular to a third line are parallel to each other, because of the parallel postulate. Conversely, if one line is perpendicular to a second line, it is also perpendicular to any line parallel to that second line.

In Figure 3, all of the orange-shaded angles are congruent to each other and all of the green-shaded angles are congruent to each other, because vertical angles are congruent and alternate interior angles formed by a transversal cutting parallel lines are congruent. Therefore, if lines a and b are parallel, any of the following conclusions leads to all of the others:

  • One of the angles in the diagram is a right angle.
  • One of the orange-shaded angles is congruent to one of the green-shaded angles.
  • Line 'c' is perpendicular to line 'a'.
  • Line 'c' is perpendicular to line 'b'.

Finding the perpendiculars of a function

Algebra

In algebra, for any linear equation y=mx + b, the perpendiculars will all have a slope of (-1/m), the opposite reciprocal of the original slope. It is helpful to memorize the slogan "to find the slope of the perpendicular line, flip the fraction and change the sign." Recall that any whole number a is itself over one, and can be written as (a/1)

To find the perpendicular of a given line which also passes through a particular point (x, y), solve the equation y = (-1/m)x + b, substituting in the known values of m, x, and y to solve for b.

Calculus

First find the derivative of the function. This will be the slope (m) of any curve at a particular point (x, y). Then, as above, solve the equation y = (-1/m)x + b, substituting in the known values of m, x, and y to solve for b.

Symbol in Unicode

In the Unicode character set, the perpendicular sign has the codepoint U+27C2 and is part of the Miscellaneous Mathematical Symbols-A range: ⟂.

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