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

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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The area of an equilateral triangle with side length 6 cm is:

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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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What is the sum of the first 10 positive even numbers?

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If a:b = 5:7 and b:c = 6:11, what is a:c?

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If x + y = 10 and xy = 21, what is the value of x³ + y³?

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If the perimeter of a square is 40 cm, what is the area of the square?

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If sin(x) = 3/5 and x is in the first quadrant, what is cos(x)?

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If the sum of the angles of a polygon is 1080°, how many sides does the polygon have?

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What is the square root of 144?

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