Q. 7

Lengths of sides of a triangle are 3 cm, 4 cm and 5 cm. The triangle is
A. Obtuse angled triangle

B. Acute-angled triangle

C. Right-angled triangle

D. An Isosceles right triangle

Answer :

Given: Lengths of sides of a triangle are 3 cm, 4 cm and 5 cm


Formula Used/Theory:-


Pythagoras theorem:-


Base2 + Height2 = Hypotenuse2


As Lengths of sides of a triangle are 3 cm, 4 cm and 5 cm


Squaring all sides


9,16,25


9 + 16 = 25


Which is equal to square of 3rd side


Pythagoras theorem get proved


Hence;


It is a right angled triangle

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