#80 81 Angles and Arcs 579 Concept Check radians). T. ea- Find the measure of ea
ID: 2911186 • Letter: #
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#80
81 Angles and Arcs 579 Concept Check radians). T. ea- Find the measure of each centrul angle (in ing 78. 3 Find the length of each arc intercepted by a central angle in a circle of radius r ans 2T 79, r-12.3 centimeters; rt-radians 11 80. r-.892 ccntímctc, a radians 1o 81, r = 4.82 meters; 0-60° 82, r-71.9 centimeters; dif- 135° ex- Distance between Cities Find the distance in kilometers be- tween the pair of cities whose latitudes are given. Assume that the cities are on a north-south line, and that the radius of Earth is 6400 kilometers. Round answers to the nearest hun- dred kilometers. on- 83. Madison, South Dakola, 44° N, and Dallas, Texas, 33 N 84, Charleston, South Carolina, 33° N, and 'Ibronto, Ontario, this 43 N 85. New York City, New York, 41° N, and Lima, Peru, 12° s 86. Halifax, Nova Scotia, 45° N, and Buenos Aires, Argentina, ptedExplanation / Answer
80 ) radius = 0.892
theta = 11pi/10 radians
applying arc length formula
s = r theta
s = 0.892 * (11pi/10 )
s = 0.9812pi
arc length = 0.9812 pi
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