Final answer:
To find the angle between the brace and the side of the window, we subtract the right angle and the brace angle from the sum of all angles in a triangle, resulting in a 40° angle. The correct answer is B. 40°.
Step-by-step explanation:
The question asks to determine the angle between the brace and the side of the window, given that the bottom corner of the window forms a right angle and the brace is at a 50° angle from the bottom. In a right angle triangle, the sum of all angles is 180°. Given that the bottom corner is a right angle (90°) and the brace forms a 50° angle with the bottom, we can find the remaining angle by subtracting these two angles from 180°:
- Sum of angles in a triangle = 180°
- Right angle = 90°
- Brace angle from the bottom = 50°
- Angle from the side = 180° - 90° - 50° = 40°
Therefore, the brace is at a 40° angle from the side of the window. The correct answer is B. 40°.