The measure of 

angle∠2 

is 

enter your response here 

because it is 

supplementary to
 
one of the angles in the triangle.

The measure of angle ∠2 is **180° − (the measure of the angle in the triangle that it is supplementary to)** because it is supplementary to one of the angles in the triangle. 

This is due to the fact that supplementary angles add up to 180°. So, if angle ∠2 is supplementary to one of the angles in the triangle, you can find its measure by subtracting that angle's value from 180°.

Would you like to clarify which specific angle in the triangle you're referring to, or should I expand on this concept?

### 5 Related Questions:
1. What is the sum of the interior angles of a triangle?
2. How can you find an exterior angle of a triangle using supplementary angles?
3. What are adjacent and supplementary angles in geometry?
4. Can two angles in a triangle ever be supplementary?
5. How does knowing an exterior angle help solve for unknown angles in a triangle?

### Tip:
In any triangle, the exterior angle is equal to the sum of the two non-adjacent interior angles.

The measure of angle ∠2 is enter your response here because it is supplementary to one of the angles in the triangle.

This solution explains how to calculate the measure of angle ∠2, which is supplementary to one of the angles in a triangle. Learn about supplementary angles, key geometry formulas, and the interior angle sum theorem. Ideal for students in Grades 6-8.

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