Chapter 4 · Class 10 ICSE · Formula Sheet

Similarity Formulas — Class 10 ICSE

Understand similarity criteria for triangles and apply BPT (Basic Proportionality Theorem).

Key Formulas

AA Similarity

\text{Two pairs of equal angles}

SAS Similarity

\text{Two proportional sides, included angle equal}

SSS Similarity

\text{All three sides proportional}

BPT

\dfrac{AD}{DB} = \dfrac{AE}{EC}

Area Ratio

\dfrac{\text{Area}_1}{\text{Area}_2} = \left(\dfrac{\text{side}_1}{\text{side}_2}\right)^2

Worked Examples

1Using: Application

Apply the key formula from this topic to a sample problem.

Step 1: Identify the formula.

Step 2: Substitute the values.

Step 3: Simplify to get the answer.

Answer: See solution above

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More Class 10 ICSE Formulas

Commercial Mathematics (Banking & GST)Quadratic EquationsCoordinate GeometryCircles (Tangents & Secants)Mensuration (3D Solids)Trigonometry

Frequently Asked Questions

How many formulas are in Class 10 ICSE Similarity?+
There are 5 formulas in the Similarity chapter for Class 10 ICSE. Each formula is essential for solving problems in this topic.
How to remember Similarity formulas easily?+
Practice regularly with worked examples, group related formulas together, and use SparkEd's interactive practice mode to reinforce your memory through problem-solving.
Are these Similarity formulas enough for exams?+
Yes, these formulas cover the complete ICSE Class 10 syllabus for Similarity. Practice applying them to different types of questions for full exam readiness.

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