Verified Answer :

GinnyAnswer

To determine the measure of the third angle in a triangle when two angles are given, remember that the sum of all three angles in any triangle always equals 180°. This principle is a fundamental property of triangles.

Here are the given angles:
- First angle: 25°
- Second angle: 55°

Let's find the measure of the third angle step-by-step:

1. Write down the sum of all angles in a triangle:
\(\[ \text{Sum of the angles in a triangle} = 180° \]\)

2. Add the measures of the two given angles:
\(\[ 25° + 55° = 80° \]\)

3. Subtract the sum of the two given angles from the total sum of the angles in the triangle:
\(\[ 180° - 80° = 100° \]\)

So, the measure of the third angle is:
\(\[ 100° \]\)

Therefore, the correct option is:
- B. 100°

The answer is B because 180-55+22=100

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