Topic Details (Notes format)

How to Calculate Perimeter of Polygons

Subject: Mathematics

Book: Maths Mastery

A polygon’s perimeter is the sum of the lengths of its sides. For instance, if you have a rectangle of length 8 cm and width 5 cm, the perimeter is 2(8 + 5) = 26 cm. For a pentagon with sides 4, 4, 5, 7, and 7, the perimeter is 4 + 4 + 5 + 7 + 7 = 27. Perimeter calculations guide practical decisions like fencing land, framing pictures, or sewing. Learning to quickly sum side lengths fosters efficiency in geometry problems, blueprint analysis, and real-world measurement tasks.

Practice Questions

A sum triples in 20 years at simple interest. What is the rate of interest per annum?

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What is the square root of 144?

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What is the sum of the first 10 positive even numbers?

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If a = 4 and b = 5, what is the value of (a+b)^2?

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What is the sum of the first 50 positive integers?

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If the cost price of an item is Rs. 400 and the selling price is Rs. 500, what is the profit percentage?

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If the perimeter of a square is 40 cm, what is the area of the square?

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If the ratio of two numbers is 3:5 and their HCF is 4, what are the numbers?

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If the radius of a circle is 7 cm, what is its circumference?

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If 2x - 3 = 7, what is the value of x?

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