Chapter 6 · Class 9 CBSE · Free Worksheet PDF

Lines & Angles Sums for Class 9 — Free CBSE Worksheet PDF with Answers

Download a free printable lines & angles worksheet for Class 9 CBSE with 30 practice questions covering lines & angles concepts, practice problems, and word problems with step-by-step solutions. Includes complete answer key. CBSE-aligned for the 2025-26 syllabus.

Last updated: 5 May 2026

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30 questions (Easy + Medium + Hard) with answer key. Fresh set generated daily.

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Sample Lines & Angles Sums for Class 9 — Practice Questions

Here are 8 sample lines & angles sums from this Class 9 CBSE worksheet. Download the full PDF for all 30 questions with answers.

Q1.An angle measures 75°. What type of angle is its reflex angle?
A.Acute angle
B.Obtuse angle
C.Right angle
D.Reflex angle

Difficulty: Easy

Q2.Which of the following statements is TRUE regarding complementary and supplementary angles?
A.Complementary angles always form a linear pair.
B.The sum of two complementary angles is 180°.
C.Supplementary angles add up to 90°.
D.The sum of two supplementary angles is 180°.

Difficulty: Easy

Q3.Two angles, ∠PQR and ∠RQS, are adjacent. If a ray QS stands on a line PQ, and ∠PQS forms a straight angle, what can be concluded about ∠PQR and ∠RQS?
A.They are complementary angles.
B.They are vertically opposite angles.
C.They form a linear pair.
D.They are alternate interior angles.

Difficulty: Easy

Q4.If two lines intersect at a point, and one of the angles formed is 65°, what is the measure of its vertically opposite angle?
A.25°
B.115°
C.65°
D.180°

Difficulty: Easy

Q5.Ravi was solving a problem where two lines AB and CD intersect at O. He concluded that ∠AOC + ∠BOC = 90°. What mistake did Ravi make?
A.He assumed ∠AOC and ∠BOC are vertically opposite angles.
B.He assumed ∠AOC and ∠BOC are complementary angles.
C.He incorrectly applied the linear pair axiom.
D.He assumed line AB is perpendicular to CD.

Difficulty: Easy

Q6.In a diagram, two parallel lines 'm' and 'n' are intersected by a transversal 't'. If ∠1 and ∠2 are corresponding angles, which of the following statements is always true?
A.∠1 + ∠2 = 180°
B.∠1 = ∠2
C.∠1 + ∠2 = 90°
D.∠1 is always greater than ∠2

Difficulty: Easy

Q7.Two parallel lines 'p' and 'q' are intersected by a transversal 'r'. If an alternate interior angle is 110°, what is the measure of the other alternate interior angle?
A.70°
B.110°
C.20°
D.180°

Difficulty: Easy

Q8.If two parallel lines are intersected by a transversal, what is the relationship between the interior angles on the same side of the transversal?
A.They are always equal.
B.They are always complementary.
C.They are always supplementary.
D.They are always vertically opposite.

Difficulty: Easy

Answer Key — Sample Questions+
Q1:Reflex angle
Q2:The sum of two supplementary angles is 180°.
Q3:They form a linear pair.
Q4:65°
Q5:He incorrectly applied the linear pair axiom.
Q6:∠1 = ∠2
Q7:110°
Q8:They are always supplementary.

Download the full PDF for all 30 answers with step-by-step solutions.

About This Worksheet

TopicLines & Angles
BoardCBSE
Class9
Total Questions30 (10 Easy + 10 Medium + 10 Hard)
Answer KeyIncluded
PriceFree

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Frequently Asked Questions

Where can I download free lines & angles sums for Class 9?+
You can download a free Lines & Angles PDF worksheet for Class 9 CBSE right here on SparkEd. The worksheet includes 30 practice questions (lines & angles concepts, practice problems, and word problems with step-by-step solutions) at easy, medium, and hard levels with a complete answer key.
How many lines & angles questions are in this Class 9 worksheet?+
This SparkEd worksheet for Lines & Angles Class 9 contains 30 questions — 10 easy, 10 medium, and 10 hard. The questions cover lines & angles concepts, practice problems, and word problems with step-by-step solutions. A fresh set is generated daily so students never repeat the same sheet.
Does the Lines & Angles worksheet for Class 9 include answers?+
Yes! Every SparkEd worksheet comes with a complete answer key. Students can self-check their work after completing the sheet. The PDF is free to download and print.
Is this lines & angles worksheet aligned to CBSE syllabus?+
Yes. This worksheet is specifically designed for Class 9 CBSE students and aligned to the 2025-26 CBSE syllabus. All questions follow the CBSE exam pattern and difficulty level.
Can I print this Lines & Angles worksheet?+
Absolutely! The worksheet downloads as an A4-size PDF that is ready to print. It includes the questions, space for working, and a separate answer key — perfect for classroom use or home practice.
How is this worksheet different from NCERT textbook exercises?+
SparkEd worksheets go beyond NCERT exercises by providing 30 questions at 3 progressive difficulty levels. Level 1 (Easy) builds confidence, Level 2 (Medium) tests application, and Level 3 (Hard) prepares for exams. Each worksheet includes word problems and conceptual questions, not just computation.
Does this worksheet include lines & angles word problems?+
Yes! The worksheet includes both computation-based questions and real-world word problems. Word problems are especially important for CBSE exams, and our worksheet covers a variety of scenarios to build problem-solving skills.

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SparkEd Maths provides free printable maths worksheets for Class 1-10 across CBSE, ICSE, IB, Olympiad, UP Board, Maharashtra SSC, and TN Board. Every worksheet includes an answer key and is aligned to the 2025-26 syllabus.