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Mathematics 9 Online
OpenStudy (anonymous):

Six congruent equilateral triangles with a side 5 are placed point to point in a row. What is the perimeter of the figure?

OpenStudy (anonymous):

30 60 90 120

OpenStudy (anonymous):

@hartnn

OpenStudy (anonymous):

30?

hartnn (hartnn):

could you draw the figure ? because i am having hard time interpreting ' placed point to point in a row. '

OpenStudy (anonymous):

|dw:1355413599643:dw|

OpenStudy (anonymous):

its those but in a row

hartnn (hartnn):

then the perimeter will be just 5*(3*5) 5 equilateral triangles, each with perimeter (3*5)

OpenStudy (anonymous):

15

OpenStudy (anonymous):

there is 6 of those triangles

OpenStudy (anonymous):

dont forget there is 6 of those triangles

hartnn (hartnn):

75 is not in options...ohh 6! then 6*(3*5) = 90

hartnn (hartnn):

yes!

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