# Question #b66d2

##### 1 Answer

If we assume c is the unknown length of

#### Explanation:

The right triangle given has a **hypotenuse** of

It has an **opposite** of

From these we can find the **sine** of the angle we will call

There is a famous formula:

Here,

An angle with **opposite** is acute.

Now we know the three angles of the triangle add up to

We can find that

So the unknown