In a right-angled triangle, the sum of the angles is always 180 degrees. Since angle G is a right angle (90 degrees) and angle O is 41 degrees, we can find the measure of angle D by using the following formula:
Angle D = Total degrees in a triangle - Angle G - Angle O
Plugging in the values:
Angle D = 180° - 90° - 41° Angle D = 180° - 131° Angle D = 49°
Therefore, the measure of the angle at point D is 49 degrees.