Let's consider the given triangle be ∆ABC. First of all we must know the unique property of triangle 45° - 45° - 90°. In this the ratio of sides of the triangle is given by,
a : b : c = 1 : 1 : √2
Now as per your question elaborating it by placing values of sides in our ∆ABC,
Where,
c = hypotenuse
a & b = two sides
The length of hypotenuse is <u>3</u><u>0</u><u>c</u><u>m</u><u>.</u>