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Chapter 17 of 25
Formula Sheet

Triangles — Formula Sheet

ICSE · Class 7 · Mathematics

8 formulas from Triangles (ICSE Class 7 Mathematics) on one page, grouped by topic. Part of the ICSE Class 7 Mathematics syllabus.

45 questions24 flashcards8 formulas & key relations5 concepts

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8 Entries · 2 Sections

Formulas and Key Relations

2. Angle Properties

Sum of interior angles of a triangle = 180°

Exterior Angle Theorem: Exterior angle = sum of its two interior opposite angles

Exterior angle + Interior angle = 180°

Ratio Method for Triangle Angles: Angles = (5/12) × 180°, (3/12) × 180°, (4/12) × 180°

4. Solved Question Patterns

x + x + 40° = 180°

x + 65° + 65° = 180°

x + 2x + 2x = 180°

5x + 3x + 4x = 180°

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Frequently Asked Questions

What are the important topics in Triangles for ICSE Class 7 Mathematics?
Key topics in Triangles include Basic Parts of a Triangle, Angles in a Triangle, Classification of Triangles, Isosceles and Equilateral Triangle Properties. Study these first, then practise questions on each for Class 7 exams.
How many formulas are in Triangles?
This sheet lists 8 formulas from Triangles, grouped by topic. Learn what each symbol stands for so you can apply the formula, not just recall it.
How should I revise Triangles for Class 7 exams?
Learn the core ideas first, then work through the 45 practice questions on Triangles. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

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

More resources for Triangles

All ICSE Class 7 Mathematics Formula Sheet

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