Respuesta :

Answer:

I am pretty sure its 45 degrees

Step-by-step explanation:

Answer:

a = 4.57

Step-by-step explanation:

XM is tangent and XZ is secants: XM² = XY * XZ

9² = 7 * (7+a)

81 = 49 + 7a

7a = 81-49 = 32

a = 32/7 = 4.57