Topic Details (Notes format)

How to Interpret and Plot Pie Charts

Subject: Mathematics

Book: Maths Mastery

Pie charts represent categorical data as slices of a circle, where each slice’s angle or area corresponds to a category’s proportion. For instance, if a total budget is ₹10,000 and marketing gets ₹2,500, that slice is 25% of the pie or 90° out of 360°. To plot, calculate each category’s percentage, multiply by 360 to get slice angles, and then draw accordingly. Pie charts offer quick visual breakdowns of how parts contribute to a whole, aiding in budget distributions, poll results, and market share analysis. Mastery ensures your data storytelling is intuitive, vivid, and effective.

Practice Questions

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

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What is the area of an equilateral triangle with side length 10 cm?

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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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What is the greatest common divisor (GCD) of 36 and 48?

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What is the sum of the first 50 positive integers?

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The sides of a triangle are 7, 24, and 25. Is this a right triangle?

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

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A sum of money doubles itself in 5 years at simple interest. What is the rate of interest?

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The sum of the reciprocals of two numbers is 1/4. If one number is 12, what is the other?

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If two complementary angles differ by 30°, what are the angles?

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