102 + 31 = 133
180 - 133 = 47
Your missing angle is 47.
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Given that she slides at a rate of 8m/s and that she was 5 m of the ground after 3 seconds, the number of seconds it takes her to reach the ground from the current position is given by:
Therefore, the number of seconds it takes her to slide to the ground from the top is given by: