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Mathematics 21 Online
OpenStudy (anonymous):

HELP PLEASE 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.

OpenStudy (anonymous):

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):

@jim_thompson5910

OpenStudy (anonymous):

@zepdrix

jimthompson5910 (jim_thompson5910):

how far did you get?

OpenStudy (anonymous):

i dont know, what i have to do

OpenStudy (anonymous):

i think its B

OpenStudy (anonymous):

@jim_thompson5910

OpenStudy (anonymous):

@JoannaBlackwelder

OpenStudy (anonymous):

@ganeshie8

jimthompson5910 (jim_thompson5910):

because "Triangles PQS, QRS, and PRQ are similar" we can set up this equation PR/PQ = PQ/PS and then cross multiply to get PR*PS = PQ*PQ PR*PS = 4*4 ... replace PQ with 4 since PQ = 4 PR*PS = 16

jimthompson5910 (jim_thompson5910):

see how I did that?

OpenStudy (anonymous):

yes got it, so then what?

OpenStudy (anonymous):

so its a or c

OpenStudy (anonymous):

@jim_thompson5910

OpenStudy (anonymous):

help please @JoannaBlackwelder @JMark @jim_thompson5910

jimthompson5910 (jim_thompson5910):

because those triangles are similar, you can also say PR/QR = QR/SR what can you do with that info?

OpenStudy (anonymous):

cross multiply?

OpenStudy (anonymous):

PR*QR QR*SR? @jim_thompson5910

jimthompson5910 (jim_thompson5910):

not quite

jimthompson5910 (jim_thompson5910):

but yes you do cross multiply

jimthompson5910 (jim_thompson5910):

to get PR*SR = QR*QR

jimthompson5910 (jim_thompson5910):

then what?

OpenStudy (anonymous):

then you place the numbers? look for a number to change the letters

OpenStudy (anonymous):

9*9? @jim_thompson5910

jimthompson5910 (jim_thompson5910):

so PR*SR = 81

OpenStudy (anonymous):

so its C right

OpenStudy (anonymous):

@jim_thompson5910

jimthompson5910 (jim_thompson5910):

correct

OpenStudy (anonymous):

can you help me with one more

OpenStudy (anonymous):

@jim_thompson5910

OpenStudy (anonymous):

Look at the figure shown below:

OpenStudy (anonymous):

OpenStudy (anonymous):

Nora is writing statements as shown to prove that if segment ST is parallel to segment RQ, then x = 45.

OpenStudy (anonymous):

Statement Reason 1. Segment ST is parallel to segment RQ Given 2. Angle QRS is congruent to angle TSP Corresponding angles formed by parallel lines and their transversal are congruent. 3. Angle SPT is congruent to angle RPQ Reflexive property of angles. 4. Triangle SPT is similar to triangle RPQ Angle-Angle Similarity Postulate 5. ? Corresponding sides of similar triangles are in proportion.

OpenStudy (anonymous):

Which equation can she use as statement 5? 60:x = 48:(48 + 36) 60 + x = 48 + 36 60 - x = 48 − 36 60:(60+x) = 48:(48 + 36)

OpenStudy (anonymous):

@jim_thompson5910

OpenStudy (anonymous):

i dont know what to do

OpenStudy (anonymous):

@ganeshie8 please help

ganeshie8 (ganeshie8):

please limit to one question per post

OpenStudy (anonymous):

if i post it again can you help me?

ganeshie8 (ganeshie8):

wil try, opening a new question bumps ur question in the top and makes others see it and increase ur chances of getting help quick... so... its for your good only :P

OpenStudy (anonymous):

ok thanks

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