obtuse angles
Past ninety degrees
An obtuse angle measures more than 90 degrees but less than 180 degrees—wider than a right angle but not yet a straight line.
The term appears in geometry classes and architectural descriptions: The roof's obtuse angles gave the building an unusual profile.
Compare with acute angles, which are sharper than 90 degrees.
- law of cosinesTriangle side-angle relation
- degreesUnits of measurement
- vertexPoint where edges converge
- protractorAngle-measuring instrument
- magnitudesMeasures of size
geometry · isosceles triangles · scalene triangles · Euclidean geometry · mathematics · blunt · sectors · radians · sine · Cartesian plane · open wide · technical drawing · drafting table · unit circle · coordinate system · theorems · polar coordinates · tangent
obtuse anglesacute angles
Measures below ninety degrees
acute angle · sharp angles · right angles · right angle · straight angles
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