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Important Questions

Triangles

ICSE · Class 7 · Mathematics

Most important questions from Triangles for ICSE Class 7 Mathematics board exam 2026. MCQs, short answer, and long answer questions with marks.

45 questions24 flashcards5 concepts

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45 Questions·
multiple choicemultiple correct

Sample Questions

1multiple choice
3 marks

In triangle ABC, A = 55b0 and B = 45b0. A side is produced at C to form an exterior angle. Find that exterior angle.

Show answer

100b0

The exterior angle equals the sum of the two interior opposite angles. So the exterior angle at C = 55b0 + 45b0 = 100b0.

2multiple choice
3 marks

In an isosceles right angled triangle, what are the two equal acute angles?

Show answer

45b0 and 45b0

One angle is 90b0. The other two angles are equal and their sum is 90b0. So each one is 45b0.

3multiple choice
3 marks

In triangle ABC, A = 2x + 20b0, B = x + 30b0, and C = 2x - 10b0. Find x.

Show answer

28

Use the angle sum property: (2x + 20) + (x + 30) + (2x - 10) = 180. This gives 5x + 40 = 180, so 5x = 140 and x = 28.

4multiple choice
3 marks

A triangle has two angles 48b0 and 73b0. Find the third angle.

Show answer

59b0

The sum of the three angles is 180b0. The known angles add to 121b0, so the third angle is 180b0 - 121b0 = 59b0.

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Frequently Asked Questions

What are the important topics in Triangles for ICSE Class 7 Mathematics?
Triangles covers several key topics that are frequently asked in ICSE Class 7 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Triangles — ICSE Class 7 Mathematics?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Triangles?
There are 45 practice questions available for Triangles. These cover multiple question types including MCQs, short answer, and long answer questions.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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