Angle (∠) in LaTeX
\angle produces the angle symbol used to name a geometric angle, as in \angle ABC. Related commands \measuredangle and \sphericalangle come from the amssymb package.
LaTeX command
\angleNot the symbol you meant? Draw it to find the command →
\angle renders the plain angle sign and is standard for naming an angle by its three defining points or by its vertex, for example \angle ABC or \angle B. It works in math mode with no package and renders in KaTeX. It is an ordinary symbol, not a relation, and is placed before the point labels.
Two related symbols come from amssymb in full LaTeX: \measuredangle (an angle drawn with an arc, for a measured angle) and \sphericalangle. KaTeX supports both. Use plain \angle for a generic angle and reserve the others for when the distinction matters.
Combine \angle with the degree superscript to state a measure, for example \angle ABC = 90^{\circ}. LaTeX handles the spacing between the symbol and its labels, so \angle ABC reads correctly without manual adjustment.
Examples
$\angle ABC = 90^{\circ}$a named right angle
$\angle A + \angle B + \angle C = 180^{\circ}$angles of a triangle
$\measuredangle PQR$a measured angle (needs amssymb)
$\angle 1 \cong \angle 2$two congruent angles
Tips and common mistakes
\angleneeds no package and works in KaTeX;\measuredangleand\sphericalangleneed amssymb in full LaTeX.- Name the angle after the symbol with the vertex in the middle:
\angleABC. - Pair it with the degree mark for a measure:
\angleABC = 90^{\circ}. - Do not confuse
\anglewith\perp(perpendicular) or\triangle; they are separate geometry symbols. - For an angle bracket used in inner products, use
\langleand\rangle, not\angle.
Working from handwritten notes?
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Convert your maths to LaTeX →FAQ
How do I write the angle symbol in LaTeX?
Use , for example . It needs no package and works in KaTeX.
How do I show the measure of an angle?
Combine \angle with the degree superscript: .
What is the difference between \angle and \measuredangle?
\angle is the plain angle sign; \measuredangle adds a small arc to denote a measured angle and comes from amssymb in full LaTeX.