Question

it is possible to have atrisngle with these sides.
(1) 3cm,4cm,5cm

Answer 1

yes it is possible to have a triangle with sides 3,4,5
the triangle formed would be a right angled triangle
because
$( 5)^{2} =( 3)^{2} + (4)^{2}$

Answer 2

yes,it is possible
acccording to pytagoras triplet,
AC²=AB²+BC²
(5)²=(3)²+(4)²
25=9+16
25=25