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triangle

triangle

6 4.2
A flat plastic or metal tool used to draw straight lines at set angles
  • noun
  • /ˈtraɪæŋɡəl/
  • Specialized
translation icon : escuadra
  • To draw the roof's angles accurately, I grabbed my metal triangle from the toolbox.

Examples

  • In order to prepare for that calculation, it is important to have a quick refresher on triangles.

    Academic text (2011)
  • Getting somewhere and then what you want to do is just make sure that the triangle and your line connect.

  • So let's say all of these are at one unit out, and then we want to draw another triangle on top.

  • Part of an envelope rose above a cabinet in a neat isosceles triangle.

    Fiction book (1992)
  • The "triangle" line draws a triangle to the canvas, rotated and colored.

    Blog text (10)
  • So to draw a triangle for Theta, we need to get rid of this cosine inverse.

  • He's drawing a triangle.

  • The alternation of red and white concentric stripes within the triangles enhances this effect.

    Academic text (1990)
  • The architect used a plastic triangle to ensure the lines of the drawing were perfectly straight.

  • In geometry class, we learned to measure angles using a triangle that had 30°, 45°, and 60° marks.

Compounds

An area of sea between Miami, Bermuda, and Puerto Rico where ships and planes are said to disappear

right triangle
  • Specialized
2 3.2

A triangle with one angle equal to 90 degrees

isosceles triangle
  • Specialized
1 3.4

A triangle with two sides of the same length

Bermuda Triangle
  • Informal
1 5.8

A part of a project where tasks, decisions, or resources disappear and never get done

A triangle with one angle of 90 degrees

A triangle with all three sides the same length

obtuse triangle
  • Specialized
1 3.3

A triangle with one angle larger than 90 degrees

oblique triangle
  • Specialized
1 6.9

A triangle with no right angle

Pythagorean triangle
  • Specialized
1 6.1

Triangle with a right angle whose sides are whole numbers and follow a^2 + b^2 = c^2

scalene triangle
  • Specialized
1 4.4

A triangle that has all sides of different lengths and all angles of different sizes

equiangular triangle
  • Specialized
5.8

A triangle with three equal angles, each 60 degrees

acute-angled triangle
  • Specialized
3.2

A triangle in which all three angles are less than 90 degrees

acute triangle
  • Specialized
3.9

A triangle with all three angles less than 90 degrees

A romantic relationship between three people with love and jealousy

4.7

A triangle with one angle greater than 90 degrees

A small group of three bright stars in the southern sky near Circinus and Apus

spherical triangle
  • Specialized
9.8

A triangle on a sphere made by three arcs of great circles

Surface Forms

triangle singular
triangles plural

Morphology

triangle = angle (semi-transparent) = tri + angle

The form itself transparently denotes a three-angled shape.

Etymology

Triangle (the drawing tool) is named for its three-sided shape and its work with angles, made of tri- 'three' and angle 'corner', so the tool helps you draw exact angles and straight lines.