In a [tex]45^{\circ}-45^{\circ}-90^{\circ}[/tex] triangle, if the length of a leg is 6 cm, the length of the hypotenuse is:

A. [tex]6 \sqrt{2} \, \text{cm}[/tex]

B. [tex]6 \sqrt{3} \, \text{cm}[/tex]

C. 12 cm

D. [tex]6 \sqrt{5} \, \text{cm}[/tex]



Answer :

In a [tex]\(45^\circ-45^\circ-90^\circ\)[/tex] triangle, the sides follow a specific ratio. This kind of triangle is an isosceles right triangle, meaning both legs have the same length, and the hypotenuse can be calculated using this ratio: If each leg is of length [tex]\(a\)[/tex], then the hypotenuse [tex]\(h\)[/tex] is given by [tex]\(a \sqrt{2}\)[/tex].

Given that each leg of the triangle is 6 cm, we can apply this ratio to find the length of the hypotenuse.

1. Start with the given length of the leg: 6 cm.
2. For a [tex]\(45^\circ-45^\circ-90^\circ\)[/tex] triangle, the hypotenuse is [tex]\( \text{leg} \times \sqrt{2} \)[/tex].

So, the length of the hypotenuse is:
[tex]\[ 6 \times \sqrt{2} \][/tex]

Numerically evaluating [tex]\( 6 \times \sqrt{2} \)[/tex] yields:
[tex]\[ 6 \times \sqrt{2} = 8.485281374238571 \, \text{cm} \][/tex]

Therefore, the correct answer in the context of the multiple-choice options given is:
[tex]\[ 6 \sqrt{2} \, \text{cm} \][/tex]