StudyMatic
🧾 CBSE · Class 9

Class 9 Maths: Lines and Angles Worksheet (with Answers)

A free, print-ready worksheet on Lines and Angles for CBSE Class 9 Maths, with a matching answer key. Use the sample below, or build your own with the exact mix of questions you need — no login, no ads.

Generate your own worksheet for this chapter →Read the chapter notes

Sample worksheet

7 of 19 questions from this chapter. Generate your own for the full set, more variations, and a clean print layout.

  1. 1. Two angles that add up to 180° are called:
    • (a) vertically opposite
    • (b) adjacent only
    • (c) complementary
    • (d) supplementary
  2. 2. The angles of a linear pair add up to:
    • (a) 270°
    • (b) 360°
    • (c) 180°
    • (d) 90°
  3. 3. When two lines intersect, the vertically opposite angles are:
    • (a) equal
    • (b) complementary
    • (c) reflex
    • (d) supplementary
  4. 4. For parallel lines cut by a transversal, corresponding angles are:
    • (a) equal
    • (b) unequal
    • (c) complementary
    • (d) supplementary
  5. 5. What is the supplement of 120°?
  6. 6. Define alternate interior angles.
  7. 7. Two parallel lines are cut by a transversal. If one of the eight angles is 70°, find all the others.
View answers
  1. 1. (d) supplementary — Angles summing to 180° are supplementary.
  2. 2. (c) 180° — A linear pair sums to 180°.
  3. 3. (a) equal — Vertically opposite angles are equal.
  4. 4. (a) equal — Corresponding angles are equal.
  5. 5. 180° − 120° = 60°.
  6. 6. The pair of equal angles on opposite sides of a transversal, between two parallel lines.
  7. 7. The angles come in two groups. All angles equal to the 70° one (its vertically opposite, corresponding and alternate angles) are 70°. The remaining angles are its supplements, each 110°. So four angles are 70° and four are 110°.
Build the full worksheet →

How it works

Every question is drawn from StudyMatic’s own Maths bank for Lines and Angles — nothing is auto-generated or invented. Pick how many of each type you want, add your own questions if you like, choose 1–4 paper sets for anti-cheating, and print the worksheet and answer key separately or save them as PDF.

More Class 9 Maths worksheets

Number SystemsworksheetPolynomialsworksheetCoordinate GeometryworksheetLinear Equations in Two VariablesworksheetIntroduction to Euclid's GeometryworksheetTrianglesworksheetQuadrilateralsworksheetCirclesworksheetHeron's FormulaworksheetSurface Areas and VolumesworksheetStatisticsworksheet

All Class 9 Maths worksheets →

FAQ

Is this Class 9 Maths worksheet on Lines and Angles free?
Yes — it is completely free, with no login and no ads. You can print it or save it as a PDF, and generate unlimited variations.
Does the Lines and Angles worksheet come with answers?
Yes. Every worksheet has a separate answer key with the correct answers, short explanations and marks, so it is ready for marking.
Can I choose how many questions and which types?
Yes. Open the generator for this chapter and set how many MCQs, short, long and HOTS questions you want; totals and marks update live, and you can swap any single question.
Which board and class is this for?
This worksheet is aligned to CBSE Class 9 Maths, chapter “Lines and Angles”.