If A is 90 degrees, what is the value of angle D in the triangle?
To find the value of angle D in the triangle, we need more information. The triangle could be any type of triangle - scalene, isosceles, or equilateral. We also need to know the values of the other angles in the triangle or have some additional information about the triangle.
However, if you are referring to a right triangle, where one of the angles is 90 degrees, we can determine the value of angle D. In a right triangle, the sum of the measures of the two acute angles is always 90 degrees. So, if angle A is 90 degrees, angle D would be the remaining acute angle in the triangle, which would be 90 degrees minus the measure of angle A.
Therefore, if A is 90 degrees in a right triangle, angle D would be 90 - 90 = 0 degrees.