Points, Lines and Planes Worksheets
Identify lines, rays and segments, use labeled diagrams, and reason about collinearity and planes.
Before you begin
Recognize points and read labels from left to right on a diagram.
Worked example
A, B and C lie on a line in that order. AB = 4 cm and BC = 7 cm. Find AC.
- B lies between A and C, so the two segments do not overlap.
- Use segment addition: AC = AB + BC.
- Add: 4 + 7 = 11 cm.
Answer: 11 cm
A ray name starts with its endpoint. Two distinct points determine a line; three non-collinear points determine a plane.
Choose your level
- Easy: Name and identify labeled lines, rays and segments.
- Medium: Use segment addition and midpoint relationships.
- Hard: Combine diagram reasoning with line and plane postulates.
Questions and answer calculations checked on 2026-09-17. How we check worksheets. Free for personal and classroom use.
Preview and print an easy set
Try six questions below, or choose a full set at your level.
1
Identify the figure labeled F and G. Give its type and the number of endpoints.
2
Name the ray using points S and T, starting at S.
3
Identify the figure labeled U and V. Give its type and the number of endpoints.
4
Name the segment using points R and S.
5
Identify the figure labeled Q and R. Give its type and the number of endpoints.
6
Name the line using points Z and A.
Answer Key
1. segment; 2 endpoints2. ray ST (endpoint S)3. line; 0 endpoints4. segment RS (or SR)5. ray; 1 endpoints6. line ZA (or AZ)