Answer:
b. 65 degrees.
Explanation:
m < RST = m < STU (alternate angles), so
x + 50 = 3x + 20
50 - 20 = 3x - x
2x = 30
x = 15.
Now m < RVT = m < RST ( opposite sides of a parallelogram are equal).
So m < RVT = x + 50 = 15 + 50 = 65.
65
<S = <t
2x = 30, x = 15
. <t = <v
3x + 20 = 45 + 20 = 65
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