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To find the measure of the third angle \( x \) in the triangle, we can use the fact that the sum of the angles in any triangle is always 180°.

The angles provided are 125° and 27°.

Let's set up the equation:

\[
125^\circ + 27^\circ + x = 180^\circ
\]

Now, solve for \( x \):

\[
x = 180^\circ - 125^\circ - 27^\circ
\]

\[
x = 180^\circ - 152^\circ
\]

\[
x = 28^\circ
\]

Therefore, the measure of the third angle is 28°.

The correct answer is **B. 28°**.

Would you like more details, or do you have any questions about this?

Here are 5 follow-up questions related to this topic:
1. What is the general formula for the sum of angles in a polygon?
2. How do you classify a triangle with an angle larger than 90°?
3. What is the difference between an acute and obtuse triangle?
4. Can a triangle have more than one obtuse angle? Why or why not?
5. How would you calculate the missing angle if given an exterior angle of the triangle?

**Tip:** Always remember that the sum of the angles in any triangle is 180°, and this is key to solving many triangle-related problems.

Monique has a triangular picture frame. She used a protractor to measure one angle at 125° and a second angle at 27°. What is the measure of the third angle?

Learn how to solve for the missing angle in a triangle with given angles of 125° and 27°. This problem demonstrates the use of the Triangle Angle Sum Theorem, which states that the sum of the interior angles of a triangle is always 180°. Suitable for students in Grades 6-8.

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