question about precision

Manuel shared this question 2 years ago

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I have to calculate the area of a quadrilateral (given sides and one angle) with high precision for uni. I tested my results with geogebra using the show 15 decimal places option, but they differ form the 7th significant digit on. Should trust my code or geogebra?

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Comments (6)

ccambre ● 2 years ago

Please include a file. It's useless just to talk about it

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Manuel ● 2 years ago

sure thing:

"cuadriatero_lados.ggb" calculates the area given the sides a,b,c,d and angle 'alfa' as constants using the input line,

"cuadriatero_vertices.ggb" calculates the area given the points R,S,T,U in the same manner

Files: cuadriatero_lad... cuadriatero_ver...

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mathmagic ● 2 years ago

en tus archivos veo dos cuadrilateros totalmente diferentes así que no sé qué comparar; ¿podrías mandar dos cuadrilateros con los lados de igual longitud y un angulo igual y que dé areas diferentes?

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Michael Borcherds ● 2 years ago

Also in both files you seem to be using GeoGebra's Polygon() command to calculate the area

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Manuel ● 2 years ago

it seems I didn't explain myself, I need to calculate the area programming and using trigonometry. I just wondered if geogebra was a reliable tool to check the answers with high precision

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mathmagic ● 2 years ago

la cuestión es ¿por qué duda de los calculos hechos con GG?

si ha encontrado algo equivocado nos gustaría ver qué es

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