This mathematics ClipArt gallery offers 36 illustrations of right, acute, obtuse, reflex, straight, vertical, and adjacent angles.

Illustration that can be used to show the definition of an angle - an opening between two lines that…

Illustration to show that if an angle is bisected, and if a line drawn through the vertex perpendicular…

Illustration to show that the bisectors of two supplementary adjacent angles are perpendicular to each…

Illustration to show that the bisector of one of two vertical angles bisects the other.

Illustration to show that the bisector of two pairs of vertical angles formed by two intersecting lines…

Illustration to show that if through any point in the bisector of an angle a line is drawn parallel…

An illustration showing a straight angle. When the sides of an angle extend in opposite directions,…

Illustration showing two positive angles; angle 1 being the acute angle and angle 2 being the reflex…

An illustration showing acute, obtuse, straight, right, and reflex angles.

An illustration of two angles that are adjacent. They have the same vertex and a common side between…

Angles 1 and 2 are adjacent angles. Two angles with a common vertex and a common side between them are…

Illustration showing that the difference between angle 1 and angle 2 is angle ABC.

An illustration showing an angle the is greater than a right angle and less than a straight angle. This…

Illustration of angles with parallel sides going in the opposite direction.

Illustration of angles with parallel sides. "GH is parallel to and lies in the same direction as DE,…

Illustration showing four angles that can be used to define different relationships, such as adjacent,…

Illustration showing four angles that can be used to define different relationships, such as adjacent,…

Illustration showing six angles that can be used to define different relationships, such as adjacent,…

Illustration of the superposition of two angles to compare magnitudes of the same kind.

Illustration showing angles 1 and 2 are supplementary and angles ACD and DCB are supplementary. Also,…

Vertical angles are when two angles have the same vertex, and the sides of the one are prolongations…

Illustration showing that angles 1 and 2 are vertical and angles 3 and 4 are vertical.

Illustration of two angles whose sides are parallel, each to each, to show they are either equal or…

Illustration showing that the bisector of a given angle is the locus of points equidistant from the…

"In geometry, an angle connected with an ellipse and defined as ... angle BCL, reckoned from one determinate…