Geometry Symbols
Geometry Symbols
| ||
|---|---|---|
| Symbol | Definition | Example |
| \(\triangle\) | triangle | \(\triangle ABC \) |
| \(\bigcirc\) | circle | |
| \(\odot A\) | circle with center A | |
| \(\angle\) | angle | \(\angle ABC = 60^\circ\) |
| \(\measuredangle\) | measured angle | \(\measuredangle ABC = 60^\circ\) |
| \(\sphericalangle\) | spherical angle | \(\sphericalangle AOC = 60^\circ\) |
| \(^\circ\) | degree | 1 circle \(= 360^\circ\) |
| ' | arcminute | \(1^\circ = 60^\prime\) |
| " | arcsecond | \(1'=60^{\prime\prime}\) |
| \(r \;or\; rad\) | radiant, \(1 \;rad = 180^\circ /\pi \;\) and \(\;1^\circ = \pi / 180 \;rads\) | \(360^\circ = 2\pi\; rad\) or about \(57.2958^\circ\) |
| \(g \;or\; grad\) | gradian, four hundredth (1/400) of a full circle | \( 360^\circ = 400\; grad\) |
| \(\overleftrightarrow {AB}\) | infinite line distance | |
| \(\overline {AB}\) | line segment from endpoint A to B | |
| \(\overrightarrow{AB}\) | start line at point A | |
| \(\overset{\frown}{AB}\) | arc with endpoints A and B | |
| \(\overset{\frown}{ABC}\) | arc with endpoints A and C | |
| m\(\overset{\frown}{AB}\) | measure arc with endpoints A and B | |
| \(|A-B|\) | distance between points A and B | \(|A-B| = 9\) |
| \(\parallel\) | parallel to | \(\overline {AB} \parallel \overline {XY} \) |
| \(\nparallel\) | not parallel to | \(\overline {AB} \nparallel \overline {XY} \) |
| \(\perp\) | perpendicular lines | \(\overline {AB} \perp \overline {XY} \) |
| \(\sim\) | similarity to | \(\triangle ABC \sim \triangle XYZ\) |
| \(\cong\) | congruent, equivalent in size and shape | \(\triangle ABC \cong \triangle XYZ\) |
| \(\ncong\) | is not congruent to | \(\triangle ABC \ncong \triangle XYZ\) |
| \(\therefore\) | therefore | \( a=b\; \therefore\; b=a \) |
| \(\pi\) | \(\pi = 3.141592654... \) | \(C = \pi \cdot d = 2 \cdot \pi \cdot r\) |
Tags: Nomenclature and Symbols