Question

The sides of a triangle are 3 cm, 4 cm and 5 cm. Prove that it is
a
right angled triangle.​

Answer 1

Answer:

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Step-by-step explanation:

by pythagoras theorem , it means that the largest side is the sum of the squares of sides and then taking its square root.

let's name the sides.

largest side be AB= 5 cm

BC= 4 cm

and AC= 3 cm

using pythagoras theorem

AB^2 = BC^2 + AC^2

taking LHS, AB^2 = 5^2 = 25

taking RHS, BC^2 + AC^2 = 4^2 + 3^2

= 16 + 9 = 25

LHS = RHS

hence it is a right angled triangle