21 not sure but you can do it
Answer:
0
Step-by-step explanation:




Answer:
88.67 degrees
Step-by-step explanation:
To find the value of A, undo the tangent operation using the inverse. Use the inverse to find A.

A = 88.67
H + 121 + 31 = 180
H + 152 = 180
H = 180 - 152
H = 28