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

What is the LCM of 15 and 20?

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If a rectangle has a length of 10 cm and a width of 6 cm, what is its perimeter?

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If sin(A) = 3/5 and cos(B) = 5/13, where A and B are acute angles, what is sin(A+B)?

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What is the probability of drawing a king from a standard deck of 52 playing cards?

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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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A square is inscribed in a circle with a radius of 5 cm. What is the area of the square?

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The sides of a triangle are 13 cm, 14 cm, and 15 cm. What is its area?

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What is the value of log₃(27)?

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If x^3 - 3x^2 + 4 = 0, what is one root of the equation?

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The perimeter of a rectangle is 50 cm, and its length is 15 cm. What is its width?

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