CBSE 10 Math · U4

Geometry

CBSE Class 10 Mathematics Unit IV: similar triangles, Basic Proportionality Theorem and converse, areas of similar triangles, Pythagoras theorem and converse, and circle tangent theorems.

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A focused, distraction-free run through 70 multiple-choice questions. Hints if you need them; your score at the end.

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Difficulty guide

The label describes the problem, not your ability.

1/5 - Foundational

Warm-up setup; checks one basic idea.

2/5 - Routine exam skill

Normal syllabus skill; usually one main rule or interpretation.

3/5 - Standard multi-step

Exam-style problem with multiple steps or a common trap.

4/5 - Hard exam skill

High-end exam problem; combines methods carefully.

5/5 - Challenge

Stretch problem beyond normal exam pressure.

Topic 4.1

Basic Proportionality Theorem and Converse

Using BPT, converse of BPT, and proportional division in triangles.

Topic 4.2

Similarity Criteria and Corresponding Parts

AAA, SSS and SAS similarity, corresponding sides, scale factors and board-style applications.

Topic 4.3

Areas of Similar Triangles and Pythagoras

Area ratios of similar triangles, Pythagoras theorem, converse, and altitude-to-hypotenuse applications.

Topic 4.4

Tangents to a Circle

Tangent-radius perpendicularity, tangent lengths from an external point, and angle applications.

Topic 4.5

Mixed Geometry Proofs and Applications

Multi-step board-style problems combining similarity, BPT, area ratios, Pythagoras and tangent reasoning.

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