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Class 3 maths calculators & solutions

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India · Standard 3View curriculum reference

STANDARD 3 · FORMULA TO ANSWER

Area & perimeter

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Mathematics

Rectangle area

Calculate the area of a rectangle from its length and width. See the multiplication formula, input units and a worked example.

Inputs

Use the units shown

RESULT

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Enter your values and select Calculate.

Formula & explanation

A = length × width

Variables & units

Length: cm · minimum 0, maximum 1000000000
Width: cm · minimum 0, maximum 1000000000

Worked example

An 8 cm by 5 cm rectangle has an area of 40 cm².

Assumptions

Keep both dimensions in centimetres; area is measured in square centimetres.

Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.

Practice with an example

Use the default input values to find the answer. The reset icon restores those values.

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NCERT/CBSE references. Topic selections are curated practice; board, edition and year requirements vary. These are suggested topic collections, including related practice and enrichment; they are not exhaustive syllabus mappings, university endorsements, or complete exercise solutions. All public calculators stay available to every learner.

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