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Chapter 11 of 19
Formula Sheet

Geometry and MensurationFormula Sheet

CAT · Quantitative Aptitude

Free Geometry and Mensuration formula sheet for CAT Quantitative Aptitude 2026 — all important formulas, equations, and constants for quick reference.

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A chart summarizing common unit conversions for length, mass, volume, and area relevant to geometry and mensuration problems.
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Formula Sheet — Geometry and Mensuration

Important formulas and equations from Geometry and Mensuration for CAT Quantitative Aptitude.

Formulas — Geometry and Mensuration

Basic Angle Relationships

Sum of angles around a point = 360°
Sum of angles on a straight line = 180°
Alternate interior angles are equal (when lines are parallel)

Polygons

Sum of interior angles = (n-2) × 180°
Each interior angle of regular polygon = (n-2) × 180°/n
Sum of exterior angles = 360°

Triangles

Area = (1/2) × base × height
Area = √[s(s-a)(s-b)(s-c)] (Heron's formula)
Area = (1/2)ab sin C
a² = b² + c² (Pythagoras theorem)

Quadrilaterals

Area = (1/2) × d₁ × d₂ × sin θ
Rectangle: Area = length × breadth
Rhombus: Area = (1/2) × d₁ × d₂
Trapezium: Area = (1/2) × (a + b) × h

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Frequently Asked Questions

What topics are covered in Geometry and Mensuration for CAT?
Geometry and Mensuration is an important chapter in CAT Quantitative Aptitude. It covers key concepts and formulas that are frequently tested in the exam. Key topics include: Basic Angles and Properties, Polygons and Their Properties, Triangles - Types and Properties, Quadrilaterals and Special Cases.
How important is Geometry and Mensuration for CAT?
Geometry and Mensuration is a frequently tested chapter in CAT Quantitative Aptitude. Questions from this chapter appear regularly in previous year papers. There are 69 practice questions available for this chapter.
How to prepare Geometry and Mensuration for CAT?
Start by understanding the core concepts, then solve practice questions. Focus on formulas and their applications. Use revision notes for quick review before the exam.

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Get the full Geometry and Mensuration chapter — for free.

Practice questions, revision notes, formula sheet and AI doubt-solver for CAT Quantitative Aptitude.