Length of an arc between two angles: Difference between revisions
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Illustrate the use of your method by calculating the length of the major arc of a circle of radius 10 units, between angles of 10 and 120 degrees. |
Illustrate the use of your method by calculating the length of the major arc of a circle of radius 10 units, between angles of 10 and 120 degrees. |
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=={{header|ALGOL W}}== |
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Follows the Fortran interpretation of the task and finds the length of the major arc. |
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<lang algolw>begin |
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% returns the length of the arc between the angles a and b on a circle of radius r % |
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% the angles should be specified in degrees % |
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real procedure majorArcLength( real value a, b, r ) ; |
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begin |
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real angle; |
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angle := abs( a - b ); |
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while angle > 360 do angle := angle - 360; |
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if angle < 180 then angle := 360 - angle; |
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( r * angle * PI ) / 180 |
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end majorArcLength ; |
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% task test case % |
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write( r_w := 10, r_d := 4, r_format := "A", majorArcLength( 10, 120, 10 ) ) |
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end.</lang> |
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{{out}} |
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<pre> |
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43.6332 |
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</pre> |
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=={{header|AWK}}== |
=={{header|AWK}}== |
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