To find the measure of angle a in a triangle, we need to apply the basic property of triangles which states that the sum of all interior angles in a triangle is always 180 degrees.
If we have the measures of the other two angles in the triangle, we can easily calculate angle a by subtracting the sum of the known angles from 180 degrees. For example, if the other two angles are 50 degrees and 70 degrees, we would calculate angle a as follows:
a = 180 - (50 + 70) = 180 - 120 = 60 degreesIn case the triangle is a right triangle, the right angle measures 90 degrees, and you can use the same principle: angle a would be calculated by subtracting the measure of the other angle from 90 degrees.
It’s important to note that without specific measures for the other angles, we can only explain the method to find angle a rather than provide a numerical answer.