The value of y, the base in a right-angled triangle with a 45-degree angle, a height of
, and a hypotenuse x, is approximately 4.2 (rounded to the nearest tenth).
In a right-angled triangle with a 45-degree angle, the sides are related by the properties of a 45-45-90 triangle. The ratio of the sides is
.
Given that the height is
and the hypotenuse is (x), the base (y) can be found using the ratio:
![\[ \text{Height} : \text{Base} : \text{Hypotenuse} = 1 : 1 : √(2) \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/7fze5p6nuxzblqf0w355c94kmz5fanplbk.png)
So, we have:
![\[ 3√(2) : y : x = 1 : 1 : √(2) \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/k7aw0z3pyd9xrgpj4ry7wt5sskyaah27xj.png)
Now, solve for y:
![\[ y = 3√(2) * 1 = 3√(2) \]](https://img.qammunity.org/2024/formulas/mathematics/high-school/xptqmvrm8ie063k8p52m9hjv6c8tz60tn4.png)
Therefore, the value of y is
, rounded to the nearest tenth.