Tis the interior of angle rsu. how to find the interior of angle rsu. the first angle is rst which equals thirty eight degrees and the second is angle tsu which equals twenty eight point six.

For this problem, we apply the Angle Addition Postulate. This postulate states that the sum of all the interior angles is equal to the total angle it forms. Looking at the attached figure, this means that ∠RSU = ∠RST + ∠TSU. So, to find the value of angle RSU, you just have to add the two individual interior angles:

∠RSU = 38° + 28.6° = 66.6°