Answer:
18
Step-by-step explanation:
180-160 = 20 which equals the exterior angle
the sum of exterior angles is 360 so 360/20 = the number of sides as there is an exterior angle for every side
360/20 = 18
This is the answerrrrrrrrr
Sin O = 1 / csc O = 2/9
cos O = sqrt (1 - (2/9)^2) = sqrt 77/81 = sqrt77 / 9
Answer:
30 I think. The bird house is 45 so minus 15 you get 30
