230k views
6 votes
Help pls, fast to, thx

Help pls, fast to, thx-example-1

1 Answer

9 votes

Answer:

∠b = 64°

Explanation:

We know that a complete rotation is 360°, so:

∠b + 57° + 239° = 360°

∠b = 360° - 57° - 239°

∠b = 64°

User Bartu
by
3.7k points