The Sides of a Certain Triangle is Given Below. Find, Which of Them is Right-triangle 16 Cm, 20 Cm, and 12 Cm - Mathematics

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Sum

The sides of a certain triangle is given below. Find, which of them is right-triangle

16 cm, 20 cm, and 12 cm

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Solution

16 cm, 20 cm and 12 cm
The given triangle will be a right-angled triangle if square of its largest side is equal to the sum of the squares on the other two sides.
i.e., If (20)2 = (16)2 = (12)2
(20)2 = (16)2 + (12)2
400 = 256 + 144
400 = 400
So, the given triangle is right-angled.

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Chapter 16: Pythagoras Theorem - Exercise 16

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Selina Concise Mathematics Class 7 ICSE
Chapter 16 Pythagoras Theorem
Exercise 16 | Q 4.1

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