Topic Details (Notes format)

How to Use the Pythagorean Theorem

Subject: Mathematics

Book: Maths Mastery

The Pythagorean Theorem, a² + b² = c², applies to right-angled triangles, where c represents the hypotenuse (longest side) and a, b are the legs. For instance, if a = 3 cm and b = 4 cm, c = √(3² + 4²) = √25 = 5 cm. This theorem underlies trigonometry, enabling distance calculations in navigation, construction, and design. From verifying corners in building layouts to analyzing diagonal distances on a computer screen, Pythagoras’s principle is indispensable in geometry and everyday spatial reasoning.

Practice Questions

The sides of a triangle are 7, 24, and 25. Is this a right triangle?

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The ratio of two numbers is 3:5, and their sum is 64. What are the numbers?

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If a + b = 10 and ab = 21, what is the value of a^2 + b^2?

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What is the HCF of 72 and 120?

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If the perimeter of a square is 36 cm, what is the length of its diagonal?

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A cone has a base radius of 7 cm and height of 24 cm. What is its volume?

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If sin(θ) = 3/5 and θ is an acute angle, what is tan(θ)?

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If x² - 9x + 18 = 0, what are the roots of the equation?

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If 2a + b = 10 and a - b = 4, what is the value of a?

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If sin(A) = 1/2 and A is acute, what is the value of A?

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