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Mathematics 7 Online
OpenStudy (anonymous):

please help? matt is constructing two similar triangles for an art project. the drawing below shows matts plans but there is an error in his drawing. what changes would he make to the dimensions to change the error. explain why

OpenStudy (anonymous):

@ganeshie8

OpenStudy (anonymous):

ganeshie8 (ganeshie8):

start by finding the ratio of corresponding sides

ganeshie8 (ganeshie8):

DE/AB = ? EF/BC = ? DF/AC = ?

OpenStudy (anonymous):

de/ab= 5.2 ef/bc= 5.2 df/ac= 5.1

ganeshie8 (ganeshie8):

Yes! so it seems the third ratio has a problem

ganeshie8 (ganeshie8):

that means the side DF must have some error

ganeshie8 (ganeshie8):

because we want DF/AC also to be 5.2

ganeshie8 (ganeshie8):

how to make that ratio also equal to 5.2 ?

ganeshie8 (ganeshie8):

DF = 5.2*8.4 = 43.68 if we change DF length to 43.68, the ratio will become 5.2, yes ?

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