Answer:
2.86478897565 or 3 (if rounded to the nearest whole number)
Step-by-step explanation:
How we find circumference by using diameter is divide the diameter by pi
SO 9 divide by pi equals 2.86478897565 or 3 (if rounded to the nearest whole number)
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It is 2 because no variable
Answer:

Step-by-step explanation:
We can prove that a tangent will always be perpendicular to the radius touching it. So, the other angle in the diagram is
.
Because all the angles of a triangle sum to
, we have that
.
We combine like terms on the left side to get
.
We subtract
on both sides to get
.
So,
and we're done!
Answer:
2/7
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