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Important Questions

Area and Perimeter of Plane Figures

ICSE · Class 9 · Mathematics

Most important questions from Area and Perimeter of Plane Figures for ICSE Class 9 Mathematics board exam 2026. MCQs, short answer, and long answer questions with marks.

45 questions31 flashcards5 concepts

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A visual comparison defining perimeter as the length of the boundary and area as the measure of the surface enclosed by the boundary, using simple geometric shapes like a square and a rectangle.
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45 Questions·
multiple choicemultiple correcttrue false

Sample Questions

1multiple correct

Which of the following formulas are correct for a triangle? (Select all correct answers)

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Area = ½ × base × height, Perimeter = sum of all three sides, Area = √[s(s-a)(s-b)(s-c)] (Heron's formula)

For triangles: Area = ½ × base × height is the basic formula. Perimeter is sum of all sides. Heron's formula gives area when all three sides are known. Option B misses the ½ factor, option E is for rectangles.

2multiple choice

Find the area of a circle with radius 14 cm. (Take π = 22/7)

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616 cm²

Area of circle = πr² = (22/7) × 14² = (22/7) × 196 = 616 cm². Option A is circumference, option C is r², option D is half the correct answer.

3true false

The area of an equilateral triangle with side 'a' is (√3/4)a².

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True

This is the standard formula for area of equilateral triangle. It can be derived using the basic area formula with height = (√3/2)a.

4multiple choice

What is the area of a parallelogram with base 15 cm and height 8 cm?

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120 cm²

Area of parallelogram = base × height = 15 × 8 = 120 cm². Option B is perimeter calculation, option C is half the area, option D is average of base and height.

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Frequently Asked Questions

What are the important topics in Area and Perimeter of Plane Figures for ICSE Class 9 Mathematics?
Area and Perimeter of Plane Figures 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 Area and Perimeter of Plane Figures — ICSE Class 9 Mathematics?
Understand the core concepts first, then work through the 45 practice questions available for this chapter. Revise formulas and definitions regularly, and use flashcards for quick recall before the exam.
How many important questions are there in Area and Perimeter of Plane Figures?
There are 45 practice questions available for Area and Perimeter of Plane Figures. These cover multiple question types including MCQs, short answer, and long answer questions.

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Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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