Answer:
C 120°
Step-by-step explanation:
In an isosceles trapezoid, base angles are congruent.
[tex]\therefore m \angle A = m\angle M= 60°..(1)\\
\&\: m \angle T = m\angle H..(2)\\
m\angle M +m\angle A + m\angle T +m\angle H= 360°\\
\therefore 60° + 60° +m\angle H +m\angle H= 360°\\
[From\: equations\: (1)\: \& \:(2)] \\
\therefore 120° +2m \angle H = 360°\\
\therefore 2m \angle H = 360°-120°\\
\therefore 2m \angle H = 240°\\
\therefore m \angle H = \frac{240°} {2} \\
\huge\purple {\boxed {\therefore m \angle H = 120°}} [/tex]
