Geometry
Classifying angles worksheets
Classify 20 angles as acute, right, obtuse or straight. Ten questions use unlabelled diagrams and ten use exact degree measures, followed by a separate answer key.
Preview and downloadGeometry practice
Naming angles worksheets
Identify vertices and directed rays, give four valid names for a single angle, and name every angle formed by three or four rays. Twelve questions include complete answer lists.
Ready-made English PDF · fixed settings
Customization below makes a separate PDF.
Fixed English ready-made files. Custom settings below apply only to the configured PDF.
Ready to print
Start with a ready-made worksheet
Follow each section prompt. Name rays from the vertex outward, keep the vertex in the middle of a three-letter angle name, and include composite angles when asked for every angle.
Download the practice pages alone, or include a separate answer key or teacher model. Longer activities may use more than one page.
Customize this worksheetRead the given facts, not the page orientation
Angles keep the same measure when a diagram is rotated. A right-angle square is an exact fact; otherwise use the stated degree measures when they are supplied. The first ten questions on the classification sheet intentionally omit measures so learners reason from the picture.
Naming practice uses directed rays. Read ray BA from vertex B through A. In a multi-ray figure, every pair of rays determines an angle, including a larger angle that spans smaller sectors.
Learning objective
What this activity builds
Use the vertex and ray endpoints to name a single angle or systematically enumerate every non-reflex angle in a multi-ray figure.
Worked example
Rays BA and BC form one angle at B, labelled 4. What four names can it have?
Angle ABC, angle CBA, angle B and angle 4.
The vertex B stays in the middle of a three-letter name, and either ray may be named first. The one-letter name is unambiguous because this figure contains only one angle. The visible number supplies a fourth name.
Teaching notes
Make the practice count
- Say each ray from the vertex outward: ray BA starts at B and passes through A.
- Circle the middle letter of every three-letter angle name before checking it.
- For several rays, list endpoint pairs in an orderly table so composite angles are not missed.
- Accept the reverse three-letter order because it names the same two boundary rays.
Make it yours
Customize the practice
Choose your options, update the preview, then download the exact same pages.
Enlarged pages scroll. PDF size stays the same.
A useful next step
Related activities
Geometry
Angle-pair relationships worksheets
Identify every relationship that applies to two marked angles: adjacent, complementary, a linear pair or vertical. Eight diagrams show both exact measures and a separate checked answer key.
Preview and download
Geometry
Identifying perpendicular lines worksheets
Decide whether six pairs of extended supporting lines are perpendicular. True examples include a right-angle mark; counterexamples include parallel and oblique pairs.
Preview and download