Each leg of a [tex]45^{\circ}-45^{\circ}-90^{\circ}[/tex] triangle measures 14 cm. What is the length of the hypotenuse?

A. 7 cm
B. [tex]7 \sqrt{2}[/tex] cm
C. 14 cm
D. [tex]14 \sqrt{2}[/tex] cm



Answer :

In a [tex]\(45^{\circ}-45^{\circ}-90^{\circ}\)[/tex] triangle, the lengths of the legs are equal, and the hypotenuse is related to the legs by a simple relationship. Specifically:

1. Each leg of the triangle has the same length, which is given as 14 cm.
2. The hypotenuse of a [tex]\(45^{\circ}-45^{\circ}-90^{\circ}\)[/tex] triangle can be determined using the formula where the hypotenuse is [tex]\( \text{leg length} \times \sqrt{2} \)[/tex].

Given the leg length [tex]\( \text{leg length} = 14 \text{ cm} \)[/tex]:

To find the hypotenuse:
- Multiply the leg length by [tex]\( \sqrt{2} \)[/tex]:

[tex]\[ \text{Hypotenuse} = 14 \times \sqrt{2} \text{ cm} \][/tex]
[tex]\[ \text{Hypotenuse} = 14 \sqrt{2} \text{ cm} \][/tex]

Thus, the length of the hypotenuse is [tex]\( 14 \sqrt{2} \)[/tex] cm.

Let's match this result to the options given:
- 7 cm
- [tex]\( 7\sqrt{2} \)[/tex] cm
- 14 cm
- [tex]\( 14\sqrt{2} \)[/tex] cm

Clearly, the correct answer is [tex]\( 14\sqrt{2} \)[/tex] cm.