Angle

Illustration of an angle

Angle

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

Axes showing trigonometric angles, and quadrants.

Plane Angle of Incidence

A diagram illustrating the airplane's angle of incidence at axis A, direction of motion and thrust.

Plane Pointing Down Angle of Incidence

The diagram illustrating the plane's angle of incidence pointing down at the motion axis. The plan will…

Construction Of Angle On Straight Line

Illustration used to show how to "draw a straight line through any given point on a given straight line…

-229 Degree Trigonometric Angle

Trigonometric angle -229 degrees.

467 Degree Trigonometric Angle

Trigonometric angle 467 degrees.

Acute angle

Acute Angle

An illustration showing an angle the is less than a right angle. This is an acute angle.

Acute Angle

Angle 3 is an acute angle.

Bisected Angle

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

Bisected Angles

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

Bisected Angle

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

Bisected Angles

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

Dihedral Angle With Bisector

Illustration of a dihedral angle bisected by a plane. "Every point in a plane which bisects a dihedral…

Bisected Vertical Angle of an Isosceles Triangle

Illustration to show that the bisector of the vertical angle of an isosceles triangle bisects the base,…

Angle Bisector Drawn Parallel to A Side

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

Convex Polyhedral Angle

Illustration of a convex polyhedral angle. "The sum of the face angles of any convex polyhedral angle…

Dihedral Angle

Illustration of dihedral angle AB (or M-AB-N) formed by planes.

Dihedral Angle

Illustration of dihedral angle AB formed by planes.

Dihedral Angle

A dihedral angle is the opening between two intersecting planes.

Face Angles of Convex Polyhedral Angle

Diagram used to prove the theorem: "The sum of the face angles of any convex polyhedral angle is less…

Golden Angle

Illustration showing the golden angle. The golden angle is the smaller of two angles created by dividing…

Negative Trigonometric Angle

Negative trigonometric angle with initial and terminal sides labeled.

Obtuse angle

Perpendiculars To The Sides Of An Angle

Illustration used to show "The two perpendiculars to the sides of an angle from any point in its bisector…

Perpendiculars To The Sides Of An Angle

Illustration used to show "The two perpendiculars to the sides of an angle from any point not in its…

Polyhedral Angle

Illustration of polyhedral angle. "The opening of three or more planes which meet at a common point…

Positive Trigonometric Angle

Positive trigonometric angle with initial and terminal sides labeled.

Right Angle

Right angle with square at perpendicular lines

Straight Angle

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

Angles

Four types of angles: right, obtuse, acute, and straight.

Angles

Showing different types of angles: right, acute, and obtuse.

Acute, Obtuse, Straight, Right, And Reflex Angles

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…

Complementary Angles

Illustration of complementary angles. Two angles whose sum is a right angle.

Two Equal Dihedral Angles

Illustration of 2 equal dihedral angles.

Equal Dihedral Angles

Illustration of 3 equal dihedral angles. "Two dihedral angles have the same ratio as their plane angles."

Equal trihedral angles

Illustration used to show that two trihedral angles are equal or symmetrical when the three face angles…

Obtuse And Reflex Angles

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

Right Angles With Same Vertex

An illustration showing when one straight line meets another straight line and makes the adjacent angles…

Angles With Same Vertex

An illustration of angles with the same vertex made up of 4 lines.

Angles Used to Illustrate Sum and Difference of Two Angles

Angles used to illustrate the sum and difference of two angles and trig identities.

Superposition of Angles

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

Supplementary Angles

Illustration of supplementary angles. Two angles whose sum is a straight angle.

Supplementary Angles

Illustration of supplementary angles. Two angles whose sum is a straight angle. This can be used tow…

Supplementary Angles

Illustration of supplementary angles. Two angles whose sum is a straight angle. This can be used tow…

Supplementary Angles

Illustration that can be used to show supplementary angles. The angles form a straight line.

Symmetrical or Equal Trihedral Angles

Diagram used to prove the theorem: "Two trihedral angles, which have three face angles of the one equal…

Reference Angles/Triangles Formed by Angles in Quadrants

Lines drawn to horizontal to form triangle ratios (reference triangles, angles).

Reference Angles/Triangles Formed by Angles in Quadrants With Labels

Lines drawn to horizontal to form triangle ratios (reference triangles, angles). Axes, quadrants, abscissa,…

Vertical Angles

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

Angles With Parallel Sides

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

Positive and Negative Arcs in Circles

Illustration showing arcs measured in positive and negative angles.

Oblique Axes

Angles on a modified coordinate plane.

Angle Bisector

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

Perpendicular Bisector of a Line

Illustration showing that the perpendicular bisector of a given line is the locus of points equidistant…

Gas Chandelier

This gas chandelier is made out of metal and has a bold style with curves and angles.