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

What is the square root of 0.25?

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

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If a + b = 10 and ab = 21, what is the value of a^2 + b^2?

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The simple interest on Rs. 4000 at 5% per annum for 2 years is:

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What is the slope of a line passing through the points (2, 3) and (4, 7)?

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

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What is the value of x if 3x + 7 = 16?

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A number is increased by 20% and then decreased by 20%. What is the net change?

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If x:y = 2:3 and z:y = 4:3, what is x:z?

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The probability of getting an even number when rolling a die is:

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