Geometry Symbols
- This is a list of the most common Geometry symbols.
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|---|
| 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 |
\( a=b\; \therefore\; b=a \) |
| \(\pi\) |
\(\pi = 3.141592654... \) |
\(C = \pi \cdot d = 2 \cdot \pi \cdot r\) |
