Chapter 7 · Class 7 CBSE · Free Worksheet PDF

Triangle Sums for Class 7 — Free CBSE Worksheet PDF with Answers

Download a free printable triangles & angle properties worksheet for Class 7 CBSE with 30 practice questions covering types of triangles, properties, congruence, similarity, Pythagoras theorem, and area of triangles. Includes complete answer key. CBSE-aligned for the 2025-26 syllabus.

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

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Sample Triangles & Angle Properties Sums for Class 7 — Practice Questions

Here are 8 sample triangles & angle properties sums from this Class 7 CBSE worksheet. Download the full PDF for all 30 questions with answers.

Q1.What is a defining characteristic of an acute-angled triangle?
A.All angles are less than 90°.
B.One angle is exactly 90°.
C.One angle is greater than 90°.
D.All sides are equal.

Difficulty: Easy

Q2.Rohan claims that he drew a triangle with two obtuse angles. Is Rohan's claim possible?
A.Yes, if the third angle is very small.
B.Yes, if it's a very large triangle.
C.No, because the sum of two obtuse angles would already exceed 180°.
D.No, because triangles can only have one right angle.

Difficulty: Easy

Q3.In triangle PQR, ∠P = 45° and ∠Q = 65°. What is the measure of ∠R?
A.70°
B.80°
C.60°
D.90°

Difficulty: Easy

Q4.An exterior angle of a triangle is 120°. If one of its interior opposite angles is 70°, what is the measure of the other interior opposite angle?
A.40°
B.50°
C.60°
D.70°

Difficulty: Easy

Q5.Which of the following statements about an isosceles triangle is always true?
A.All three sides are equal.
B.All three angles are equal.
C.Exactly two sides are equal in length.
D.It must have a right angle.

Difficulty: Easy

Q6.Rahul drew a triangle and labeled its angles as 30°, 60°, and 90°. He then claimed, "This is an acute-angled isosceles triangle." What is the error in Rahul's statement?
A.The sum of angles is not 180°.
B.It is a right-angled triangle, not an acute-angled triangle.
C.It is an equilateral triangle, not an isosceles triangle.
D.All angles are acute, so it cannot be a right-angled triangle.

Difficulty: Easy

Q7.A triangle XYZ has an exterior angle at Z measuring 115°. The interior angle at X is 70°. What is the measure of the interior angle at Y (∠Y)?
A.45°
B.55°
C.65°
D.70°

Difficulty: Easy

Q8.The angles of a triangle are in the ratio 2:3:4. What is the measure of the largest angle?
A.40°
B.60°
C.80°
D.100°

Difficulty: Easy

Answer Key — Sample Questions+
Q1:All angles are less than 90°.
Q2:No, because the sum of two obtuse angles would already exceed 180°.
Q3:70°
Q4:50°
Q5:Exactly two sides are equal in length.
Q6:It is a right-angled triangle, not an acute-angled triangle.
Q7:45°
Q8:80°

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

About This Worksheet

TopicTriangles & Angle Properties
BoardCBSE
Class7
Total Questions30 (10 Easy + 10 Medium + 10 Hard)
Answer KeyIncluded
PriceFree

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Frequently Asked Questions

Where can I download free triangles & angle properties sums for Class 7?+
You can download a free Triangles & Angle Properties PDF worksheet for Class 7 CBSE right here on SparkEd. The worksheet includes 30 practice questions (types of triangles, properties, congruence, similarity, Pythagoras theorem, and area of triangles) at easy, medium, and hard levels with a complete answer key.
How many triangles & angle properties questions are in this Class 7 worksheet?+
This SparkEd worksheet for Triangles & Angle Properties Class 7 contains 30 questions — 10 easy, 10 medium, and 10 hard. The questions cover types of triangles, properties, congruence, similarity, Pythagoras theorem, and area of triangles. A fresh set is generated daily so students never repeat the same sheet.
Does the Triangles & Angle Properties worksheet for Class 7 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 triangles & angle properties worksheet aligned to CBSE syllabus?+
Yes. This worksheet is specifically designed for Class 7 CBSE students and aligned to the 2025-26 CBSE syllabus. All questions follow the CBSE exam pattern and difficulty level.
Can I print this Triangles & Angle Properties 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.

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