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

The sum of the squares of two consecutive integers is 145. What are the integers?

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

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If the ratio of two numbers is 3:5 and their HCF is 4, what are the numbers?

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The base of a triangle is 10 cm and its height is 6 cm. What is its area?

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If a:b = 3:4 and b:c = 5:6, what is a:c?

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What is the cube of 4?

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If x^2 - 6x + 9 = 0, what is the value of x?

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If the radius of a circle is 7 cm, what is its circumference?

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The angles of a quadrilateral are in the ratio 3:4:5:6. What is the largest angle?

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

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