Question

The sides of a triangle measure 15 cm, 36 cm and 39 cm. Show that it is a right-angled
triangle.
​

Answer 1

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As we know that, in a right triangle, square of the hypotenuse is equal to the sum of square of the other two sides.

Therefore,

(39)

2

=(36)

2

+(15)

2

1521=1296+225

⇒1521=1521

L.H.S. = R.H.S.

Hence the triangle is right-angled triangle.

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