language, math, photography

Perpendicular: Upright or Uptight?

Calling 90 degrees a “right” angle is a little misleading.  Yes, spatial coordinates should usually be based on perpendicular lines.  But 90 degrees is often just one angle among many, and perpendicular may not be right for the job.
 
– Gray button (upper left corner) reveals widgets, –
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Perpendicular ~ Pic and a Word Challenge #269

 
 

The ceiling should be perpendicular to the wall
(and the wall to the floor).

corner-grn-pink-align_840x639

 
 

Even the klutz who built my house got it right.

DSCN0909_upright_crop_840x533

 
 

The right angle for slicing a pizza depends on
how many slices are needed.

112039533_m_840x784

© sabelnik | 123RF Stock Photo

 
 

Willing to count a circle as a “line” perpendicular to any chosen straight line thru the center?  (I am.)  If so, then spatial coordinates should almost always (not just usually) be based on perpendicular lines.  Want to navigate on a really big pizza?  Use polar coordinates.

2 thoughts on “Perpendicular: Upright or Uptight?

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