Naming Angles
Part of the Angles section of Coddy's Geometry journey. Lesson 2 of 62.
An angle is the opening between two rays that share an endpoint. The shared endpoint is the vertex, and the two rays are the angle’s arms.
To name an angle, walk arm to vertex to arm: this one is ∠AVB, spoken “angle A V B”. The vertex letter always sits in the middle. Reading the walk backwards changes nothing: ∠AVB and ∠BVA are the same angle. When only one angle lives at a vertex, its single letter is enough: ∠V.
Test yourselfThis lesson includes a short quiz. Start the lesson to answer it and track your progress.
Test yourselfThis lesson includes a short quiz. Start the lesson to answer it and track your progress.
All lessons in Angles
1Meet the Angle
Your First AngleNaming AnglesAdding Adjacent AnglesDegrees and the Full TurnAcute, Right, ObtuseRecap: Adjacent Angles4Vertical Angles
Linear PairsVertical Angles Are EqualSolving with VerticalsAll Four AnglesRecap: At the Crossing2Straight Lines and Supplements
Angles on a LineSupplementary AnglesThree Angles on a LineWrite the EquationRecap: Along the Line5Around a Point
Angles Around a PointThe Missing AngleEqual SlicesFour Angles, One PointRecap: The Full Turn3Right Angles and Complements
Complementary AnglesFinding the ComplementPerpendicular LinesEqual Parts of a CornerRecap: The Right Corner6The Angle Bisector
The Angle BisectorBisected ExpressionsBisecting a Straight AngleRecap: Split in Half