What is the length of a leg of an isosceles right triangle whose hypotenuse measures 6 inches?

Let [tex]c[/tex] represent the value of the hypotenuse. If the hypotenuse is [tex]c = a\sqrt{2}[/tex], then [tex]6 = a\sqrt{2}[/tex]. In inches, what is the value of [tex]a[/tex]?

A. 3
B. [tex]3\sqrt{2}[/tex]
C. 6
D. [tex]6\sqrt{2}[/tex]



Answer :

Alright, let's solve this step by step.

Given:
- We have an isosceles right triangle.
- The hypotenuse ([tex]\( c \)[/tex]) measures 6 inches.
- We need to find the length of one of the legs ([tex]\( a \)[/tex]).

In an isosceles right triangle, the relationship between the legs and the hypotenuse is derived from the Pythagorean theorem. For such a triangle:

[tex]\[ c = a\sqrt{2} \][/tex]

Given [tex]\( c = 6 \)[/tex] inches, we substitute the value into the equation:

[tex]\[ 6 = a\sqrt{2} \][/tex]

To isolate [tex]\( a \)[/tex], we divide both sides of the equation by [tex]\( \sqrt{2} \)[/tex]:

[tex]\[ a = \frac{6}{\sqrt{2}} \][/tex]

To rationalize the denominator, we multiply the numerator and the denominator by [tex]\( \sqrt{2} \)[/tex]:

[tex]\[ a = \frac{6}{\sqrt{2}} \times \frac{\sqrt{2}}{\sqrt{2}} = \frac{6\sqrt{2}}{2} = 3\sqrt{2} \][/tex]

Thus, the length of each leg ([tex]\( a \)[/tex]) of the isosceles right triangle is:

[tex]\[ 3\sqrt{2} \][/tex]