Question 1194669
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A bicycle race follows a triangular course. 
The three sides of the race are 7km, 24km and 25km. 
What is the approximate measure of the angle opposite to side 7 km?
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<pre>
Use the cosine rule

    cos(of the angle "a" opposite to side 7 km) = {{{(24^2 + 25^2 - 7^2)/(2*24*25)}}} = 0.96.


    Angle a = arccos(0.96) = 0.2838 radians = 16.26 degrees.    <U>ANSWER</U>
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Solved.