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Answer:
Circumference=16pi
Arc Length=8pi
Step-by-step explanation:
Circumference formula=2(pi)(r), or d(pi)
The arc is only half of that in this case, therefore you would only pi(r) or 1/2(d)(pi).
Answer:
83
Step-by-step explanation:
The 126 angle is an exterior angle of the triangle.
The 43 and x angles are the two remote interior angles of the 126 angle.
<em>Theorem:</em>
<em>The measure of an exterior angle of a triangle equals the sum of the measures of the remote interior angles.</em>
x + 43 = 126
x = 83