Chapter 11 · Class 9 ICSE · Formula Sheet

Rectilinear Figures Formulas — Class 9 ICSE

Study properties and theorems of parallelograms, rectangles, rhombuses, and squares.

Detailed formula cards for Rectilinear Figures are being prepared. Meanwhile, practice questions to master this topic.

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Worked Examples

1Using: Supplementary Angles

If one angle is 65 degrees, find its supplement.

Step 1: Supplement = 180 - 65

Step 2: = 115 degrees.

Answer: 115 degrees

2Using: Vertically Opposite

Two lines intersect. If one angle is 40 degrees, find the vertically opposite angle.

Step 1: Vertically opposite angles are equal.

Step 2: The angle = 40 degrees.

Answer: 40 degrees

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More Class 9 ICSE Formulas

Rational & Irrational NumbersCompound InterestExpansionsFactorizationSimultaneous Linear EquationsIndices (Exponents)

Frequently Asked Questions

How many formulas are in Class 9 ICSE Rectilinear Figures?+
There are several key formulas in the Rectilinear Figures chapter for Class 9 ICSE. Each formula is essential for solving problems in this topic.
How to remember Rectilinear Figures 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 Rectilinear Figures formulas enough for exams?+
Yes, these formulas cover the complete ICSE Class 9 syllabus for Rectilinear Figures. Practice applying them to different types of questions for full exam readiness.

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