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To solve for \( x \) in the triangle, we can use the property that the sum of the angles in a triangle is always 180°.

We are given two angles:
- One angle is 39°.
- Another angle is 105°.

Let's find \( x \):

\[
x = 180^\circ - (39^\circ + 105^\circ)
\]

\[
x = 180^\circ - 144^\circ = 36^\circ
\]

So, the value of \( x \) is \( 36^\circ \).

Would you like a detailed explanation, or do you have any questions about this solution?

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Here are five related questions to deepen your understanding:

1. What is the sum of the interior angles of any triangle?
2. How would the solution change if one of the angles in the triangle was a right angle (90°)?
3. If one angle in a triangle is obtuse (greater than 90°), how does it affect the other two angles?
4. Can a triangle have more than one obtuse angle? Why or why not?
5. How can we check if the angles of a triangle form a valid triangle?

**Tip**: Always remember that the sum of angles in any triangle is 180°, no matter the type of triangle.

Find the value of x in the triangle where one angle is 39° and another angle is 105°.

Learn how to find the missing angle x in a triangle given two angles of 39° and 105°. This solution uses the triangle angle sum property, and is suitable for students in Grades 6-8.

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