Skip to main content
Super TutorResources
Chapter 15 of 28
QuestionsNotesFlashcardsSummaryFormulasQuizConceptsSyllabusPlan
Formula Sheet

Construction of Polygons

ICSE · Class 9 · Mathematics

All formulas from Construction of Polygons in ICSE Class 9 Mathematics. Key equations, constants, and identities for board exam preparation.

42 questions26 flashcards5 concepts

Interactive on Super Tutor

Studying Construction of Polygons? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for formula sheet and more.

Try Super Tutor — Free

1,000+ Class 9 students started this chapter today

A step-by-step diagram showing the construction of a quadrilateral when four side lengths and one interior angle are provided, using a ruler and compass.
Super Tutor

Super Tutor has 17+ illustrations like this for Construction of Polygons alone — flashcards, concept maps, and step-by-step visuals.

See them all
12 Formulas · 3 Sections

Formulas

Quadrilateral Construction

Constructing a quadrilateral means locating its four vertices

A rough free-hand sketch should always be drawn before starting actual construction

A quadrilateral with four sides and one diagonal given is constructed by building triangle ABC then triangle ADC

A quadrilateral with three sides and two diagonals given is constructed by building triangle ABC then triangle ABD, then joining C and D

Parallelogram Construction

AB = DC and BC = AD

OB = 1/2 BD = 1/2 × 5.0 cm = 2.5 cm

OC = 1/2 AC = 1/2 × 5.6 cm = 2.8 cm

OB = OD = 1/2 BD = 1/2 × 4.8 cm = 2.4 cm.

OA = OC = 1/2 AC = 1/2 × 5.4 cm = 2.7 cm

Rectangle Construction

Each angle of a rectangle is 90° and opposite sides are equal

Construction begins with triangle ABC then triangle ADC

A right-angled triangle ABC and another right-angled triangle ADC are used

Full sheet with units and worked examples

View All

Frequently Asked Questions

What are the important topics in Construction of Polygons for ICSE Class 9 Mathematics?
Construction of Polygons covers several key topics that are frequently asked in ICSE Class 9 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Construction of Polygons — ICSE Class 9 Mathematics?
Understand the core concepts first, then work through the 42 practice questions available for this chapter. Revise formulas and 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 Construction of Polygons

All 28 chapters — ICSE Class 9 Mathematics Formula Sheet

For serious students

Get the full Construction of Polygons chapter — for free.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan for ICSE Class 9 Mathematics.

Try Super Tutor Free
Try the full chapter — Free