It seems to be a tilted square, so all angles are the same.

so maybe just multiply by 3 and get 309 since B, C, and D are three angles.

I might be wrong but, the answer should be 309.
Answer:c
Step-by-step explanation:7x15
<h2>
Answer:</h2><h2>c = -24</h2><h2 /><h2>Hope this helps!!</h2>