To find the measure of angle D, we can use the information given. We know that:
- Angle O is 41°
Assuming angles D, G, and O are part of a triangle, we can use the triangle angle sum theorem which states that the sum of the angles in a triangle is 180°.
Let angle D be \( x \) and angle G be \( y \). Then we have the equation:
\[ x + y + 41° = 180° \]
From this, we can rearrange to find:
\[ x + y = 180° - 41° \] \[ x + y = 139° \]
Without further information about angle G, we cannot determine the exact measure of angle D solely based on angle O.
If there’s a specific relationship or additional angles in the triangle or other geometric figures, please provide that information, and I can help determine the value for angle D.