Final answer:
The measure of the third angle in the triangle is 30°.
Step-by-step explanation:
In a triangle, the sum of the measures of the three angles is always 180°. So, to find the measure of the third angle, we can subtract the sum of the other two angles from 180°.
Let's call the measure of the third angle x.
So, we have the equation:
x + 20° + 130° = 180°
Simplifying, we get:
x + 150° = 180°
Subtracting 150° from both sides, we get:
x = 30°
Therefore, the measure of the third angle is 30°.
Learn more about Triangle angles