Answer:
D is the correct answer.
Step-by-step explanation:
The lines are perpendicular as they go thiugh eachother at the center.
Would it be
(2r-7)*(2r+7)
?
Answer:
60 degrees
Step-by-step explanation:
ACD and ACB are complementary angles. Find ACB=30 degrees. Subtract 30 from 90 degrees. ACD=60 degrees.