The answer:
B. 90°
Explanation:
To find the third angle in a triangle, use the rule:
Sum of all angles in a triangle = 180°
Given:
- First angle = 60°
- Second angle = 30°
Now subtract their sum from 180°:
180° − (60° + 30°) = 180° − 90° = 90°
Question: How many degree third angle?
