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Mathematics 7 Online
OpenStudy (anonymous):

The figure shows three right triangles. Triangles PQS, QRS, and PRQ are similar. Theorem: If two triangles are similar, the corresponding sides are in proportion. Figure shows triangle PQR with right angle at Q. Segment PQ is 4 and segment QR is 9. Point S is on segment PR and angles QSP and QSR are right angles. Using the given theorem, which two statements help to prove that if segment PR is x, then x2 = 97?

OpenStudy (anonymous):

Using the given theorem, which two statements help to prove that if segment PR is x, then x2 = 97? Segment PR x segment PS = 16 Segment PR x segment SR = 36 Segment PR x segment PS = 36 Segment PR x segment SR = 81 Segment PR x segment PS = 16 Segment PR x segment SR = 81 Segment PR x segment PS = 81 Segment PR x segment SR = 16

OpenStudy (anonymous):

@phi @nikato @ganeshie8 Help please?

OpenStudy (phi):

they want you to notice you can set up these ratios \[ \frac{PS}{4}= \frac{4}{PR} \\ \frac{PR}{9}= \frac{9}{SR} \]

OpenStudy (anonymous):

So would it be one of the last two

OpenStudy (phi):

cross multiply those ratios to get the answers

OpenStudy (anonymous):

I got the third one

OpenStudy (anonymous):

@ninamarie @Destinymasha @Bethbarrson Help pleaseee

OpenStudy (nikato):

Yes. If you cross multiply @phi equations, you get the third choice

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