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The hypotenuse of a [tex]$45^{\circ}-45^{\circ}-90^{\circ}$[/tex] triangle measures [tex]$2 f$[/tex] inches. What is the length of one leg of the triangle?

A. [tex]24 \sqrt{2}[/tex] in.

B. 24 in.

C. [tex]12 \sqrt{2}[/tex] in.

D. 12 in.

Answer :

To solve the problem of finding the length of one leg of a [tex]\(45^\circ-45^\circ-90^\circ\)[/tex] triangle where the hypotenuse is given as [tex]\(2f\)[/tex] inches, you can use the properties of this special type of triangle.

In a [tex]\(45^\circ-45^\circ-90^\circ\)[/tex] triangle, the legs are of equal length and the hypotenuse is [tex]\(\sqrt{2}\)[/tex] times the length of one leg. Therefore, if the hypotenuse is [tex]\(2f\)[/tex], we can express it as:

[tex]\[ \text{Hypotenuse} = \text{Leg} \times \sqrt{2} \][/tex]

Given:
[tex]\[ \text{Hypotenuse} = 2f \][/tex]

We can set up the equation:
[tex]\[ 2f = \text{Leg} \times \sqrt{2} \][/tex]

To solve for the length of one leg, divide both sides by [tex]\(\sqrt{2}\)[/tex]:

[tex]\[ \text{Leg} = \frac{2f}{\sqrt{2}} \][/tex]

Simplify this by multiplying the numerator and the denominator by [tex]\(\sqrt{2}\)[/tex] to rationalize the denominator:

[tex]\[ \text{Leg} = \frac{2f \times \sqrt{2}}{\sqrt{2} \times \sqrt{2}} \][/tex]

[tex]\[ \text{Leg} = \frac{2f \times \sqrt{2}}{2} \][/tex]

[tex]\[ \text{Leg} = f \times \sqrt{2} \][/tex]

However, since initially, the hypotenuse was interpreted as 2 (and "f" was treated as a unit factor), let’s consider:

[tex]\[ \text{Leg} = \frac{2}{\sqrt{2}} \][/tex]

This simplifies to approximately:

[tex]\[ \text{Leg} \approx 1.414 \][/tex]

This shows that if the hypotenuse is numerically treated as 2, the length of one leg would roughly be 1.414 inches.

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