The measure of the arc intercepted by a central angle on the circle is 80°. What is the measure of the central angle?
A. 1800
B. 1450
C. 90°
D. 45° . 1000
A. 1800
B. 1450
C. 90°
D. 45° . 1000
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Answer:
To calculate arc length without radius, you need the central angle and the sector area:
•Multiply the area by 2 and divide the result by the central angle in radians.
•Find the square root of this division.
•Multiply this root by the central angle again to get the arc length.
Answer:A.1800