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Mathematics 17 Online
OpenStudy (anonymous):

In the right triangles below, DR = 16 feet, DC = 12 feet, and BF = 18 feet. What is QF?

OpenStudy (anonymous):

OpenStudy (anonymous):

I feel like QR=22. What do you think? (I'm also pretty sure I'm not right.)

OpenStudy (anonymous):

*QF

OpenStudy (anonymous):

no, QF=27

OpenStudy (anonymous):

because DC/DR= 2/3 and 18 is 2/3 of 27

OpenStudy (nubeer):

i think its 24 but not much sure on this

OpenStudy (anonymous):

Oh no, I'm not right

OpenStudy (anonymous):

DC/DR = 12/16 = 3/4 = 18/QF QF = 4*18 / 3 = 24

OpenStudy (anonymous):

nubeer, I think you were right.

OpenStudy (anonymous):

Thanks, you guys!

OpenStudy (anonymous):

assuming the triangles are similar - they are if they are both right-angled

OpenStudy (anonymous):

yw

OpenStudy (anonymous):

Yeah, I think that they were supposed to be similar because we just finished talking about similarity.

OpenStudy (anonymous):

right

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