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

If the radius of a circle is doubled, what happens to its area?

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If a:b = 7:9 and b:c = 5:6, what is a:c?

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If x^2 + 4x + 4 = 0, what is the value of x?

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If x = 3 and y = 4, what is the value of x^2 + y^2?

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What is the sum of all even numbers between 1 and 50?

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If log(100) = 2 and log(10) = 1, what is log(1000)?

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What is the area of a circle with a diameter of 14 cm?

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If the sum of the squares of two consecutive positive integers is 365, what are the integers?

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The sides of a triangle are 5 cm, 12 cm, and 13 cm. What type of triangle is it?

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What is the value of x if log(x) + log(4) = log(32)?

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