Question

Determine whether the triangle whose lengths of sides are 3 cm, 4 cm, 5 cm is a right-angled triangle.

Answer 1

Since all three sides have different lengths, it is a scalene triangle. But, we must test for a second feature. Using Pythagorus' theorem

a2+b2=c2

we find 32+42=52

9 + 16 = 25

So, these sides also cause it to be a right triangle

Answer 2

Hello user

To be a right angled triangle it must satisfy the pythagorud theorm

So, 5^2 = 25 .....1)

Also, 4^2 + 3^2 = 25 ....2)

Since 1) = 2)

So it satisfy the pythagorus theorem

So its a right angled triangle