Topic Details (Notes format)

How to Calculate the Area of a Triangle

Subject: Mathematics

Book: Maths Mastery

A triangle’s area can be found via the formula A = (1/2) × base × height. For instance, if the base is 10 cm and the height is 6 cm, the area is 1/2 × 10 × 6 = 30 cm². In more advanced contexts, Heron’s formula calculates area using side lengths: A = √[s(s – a)(s – b)(s – c)], where s = (a + b + c)/2 is the semi-perimeter. Triangular area computations show up in land surveys, building designs, and everyday geometry tasks like calculating fabric for triangular patterns. Familiarity with these formulas expands your capacity to handle diverse shape-related challenges.

Practice Questions

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

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

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What is the HCF of 72 and 120?

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If a:b = 2:3 and b:c = 4:5, what is a:c?

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What is the sum of the first 20 odd numbers?

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If x^2 - 5x + 6 = 0, what are the roots?

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How many ways can 4 people sit in a row?

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