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Since triangle XYZ is similar to triangle RST, corresponding angles are equal.
m<X = m<R
50° = m<R
m<S = m<S
79° = 79°
Since the sum of angles in a triangle is 180°, we can find the measure of angle T by subtracting the sum of angles in triangle RST from 180°.
m<T = 180° - m<R - m<S
m<T = 180° - 50° - 79°
m<T = 51°
Therefore, the measure of angle T is 51°.