Question

The sides of a triangle are of lengths 8 cm, 15 cm and 17 cm. The triangle is a triangle.

• A. right angled
• B. acute angled
• C. obtuse angled

Answer 1

The correct option is A right angled

The given sides are such that the sum of squares of two of them is equal to the square of the third side.
i.e., $8^2+{15}^2=64+225=289={17}^2$
Thus, by the converse of Pythagoras' theorem, we must have the given triangle to be right-angled.