29-30. URGENT! WILL GIVE BRAINLIEST! I've reposted this many times and no one answered, please help. I will mark you Brainliest if you answer both and leave an explanation, THANK YOU!

Answer:
angle B = 90
Step-by-step explanation:
BC is a straight line which equals to 180 and C is 90 so you would take 180 minus 90 and would get 90