fnVertexAngle ( sides ; base )

Calculate the angle the vertex of an isosceles triangle.

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Michael George - Show more from this author
Michael George Consulting

Sample input:

fnVertexAngle ( sides ; base )
15 , 13
100 , 160
250 , 250

Sample output:

51.3585772389
106.2602047083
60

Function definition: (Copy & paste into FileMaker's Edit Custom Function window)

Let(
    [
        AC = sides;
        B = base;
        result =
        Case(
            B < 2 * AC;
            Truncate( 180 - ( Degrees( Acos( ( B / 2 ) / AC ) ) * 2 ); 10 );
            ""
        )
    ];
    result
)

Use to calculate the angle of the vertex of an isosceles triangle if the lengths of the sides and base are already known. Output is in degrees, truncated at 10 decimal place of precision. No output if the base length is not less than the side lengths * 2 (otherwise it would be a line, not a triangle.)

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Note: these functions are not guaranteed or supported by BrianDunning.com. Please contact the individual developer with any questions or problems.

fnVertexAngle ( sides ; base )

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