In a triangle, the sum of all angles is always 180 degrees. Given that you have one angle as 50 degrees and another angle as 70 degrees, you can find the third angle (which we will call \(d\)) using the formula for the sum of angles in a triangle:
\[ d = 180^\circ - (50^\circ + 70^\circ) \]
Calculating this:
\[ d = 180^\circ - 120^\circ = 60^\circ \]
So the value of \(d\) is \(60^\circ\).