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 train 150 m long passes a pole in 15 seconds. What is its speed?

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If 5x - 2 = 13, what is the value of x?

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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 all even numbers between 1 and 100?

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How many diagonals does a pentagon have?

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A man rows downstream at 6 km/h and upstream at 4 km/h. What is the speed of the stream?

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A car travels 240 km in 4 hours. What is its average speed?

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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 sum of three consecutive integers is 96, what are the integers?

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What is the 7th term of the arithmetic progression 3, 6, 9, 12,...?

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