Answer:
radius, or r equals 9in. radius=9in
Step-by-step explanation:
d=diameter. The radius is half of the diameter.

so, radius=9in
Answer:
41 sq. in.
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Answer:
no, because the angle measurements would have to be the same
Step-by-step explanation:
Triangle A: 30, 77, 73
Triangle B: 30, 83, 67