Question

The sides of a triangle are of lengths 4.5 cm, 6 cm and 7.5 cm. The triangle is a right-angled triangle.

• A. True
• B. False

Answer 1

The correct option is A True

Note that 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., $(4.5{)}^2+(6{)}^2=20.25+36=56.25=(7.5{)}^2$
Thus, by the converse of Pythagoras' theorem, we must have the given triangle to be right-angled.