Black triangle may refer to: Black Triangle (region), across Germany, Poland and the Czech Republic, long characterized by extremely high levels of pollution...

Black triangles are UFOs reported as having a triangular shape and dark color, typically observed at night, described as large, silent, hovering, moving...

The inverted black triangle (German: schwarzes Dreieck) was an identification badge used in Nazi concentration camps to mark prisoners designated asozial...

The Black Triangle (German: Schwarzes Dreieck) is the border region between Germany, Poland and the Czech Republic, long characterized by extremely high...

the black triangle with a Z notation (for Zigeuner, meaning Gypsy) to the right of the triangle's point. Roma were later assigned a brown triangle. Mentally...

A black triangle appearing after the trade name of a British medicine (or vaccine) indicates that the medication is new to the market, or that an existing...

imprisoned; some were classified as "asocial", wearing a black triangle.) The pink triangle was also assigned to others considered sexual deviants, including...

to Euclid. Equilateral triangle Isosceles triangle Scalene triangle Right triangle Acute triangle Obtuse triangle Each triangle has many special points...

the AVEN triangle which was used in the past to represent asexuality. The original iteration of the AVEN triangle, made by David Jay, was a black-bordered...

pacifists. More recently the black triangle has been adopted as a symbol in lesbian culture and by disabled activists. Black shirts were also worn by the...