anyone can help please???
look at the figure below
Which expression is equal to ab/rq
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OpenStudy (anonymous):
OpenStudy (anonymous):
AWNSERS
PQ/PB
PA/PR
PQ/PA
AR/AB
jimthompson5910 (jim_thompson5910):
Hint:
triangles PAB and PRQ are similar
So the corresponding sides are in proportion with one another
So
AB/RQ = PA/PR
AB/RQ = PB/PQ
etc etc
OpenStudy (anonymous):
K... SO is it c????
jimthompson5910 (jim_thompson5910):
no
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OpenStudy (anonymous):
PA/PR
OpenStudy (phi):
ab/rq is the ratio of little triangle to big triangle.
look for a side of the little triangle to its corresponding side in the big triangle
OpenStudy (phi):
pq/pb are corresponding sides, but it's big to little (we want little to big)
OpenStudy (phi):
pa/pr that looks good.
OpenStudy (anonymous):
ohhh okay i got it now , is it b
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jimthompson5910 (jim_thompson5910):
yes
OpenStudy (phi):
pq/pa do not correspond
OpenStudy (phi):
ditto ar/ab. do not correspond
OpenStudy (anonymous):
alright i get it know thanks guyzz :) <3
OpenStudy (anonymous):
wanna help me with anopther one ??:)
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jimthompson5910 (jim_thompson5910):
sure
jimthompson5910 (jim_thompson5910):
go ahead and ask
OpenStudy (anonymous):
k hold up
OpenStudy (anonymous):
Triangle PQR is similar to triangle ABC in the figure below What is the perimeter of triangle ABC
10.5 inches
39.9 inches
42.0 inches
60.65 inches
jimthompson5910 (jim_thompson5910):
First solve
x/3 = 17.5/5
for x to find the length of AC
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OpenStudy (phi):
step 1. is find AC
if the triangles are similar then the length of the side of the big triangle = some number times the length of the little one:
B= k * L
14= k* 4
find k
then use it to find AC
AC= k*3
OpenStudy (anonymous):
42 inches
OpenStudy (anonymous):
ok ill work it out thanks so muchhhh, ur a genius :))
OpenStudy (phi):
or use ratio's like jt shows
OpenStudy (phi):
step 2: add up the lengths to get the perimeter
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OpenStudy (phi):
Thinking about it, ratios are nice, once you get the hang of them
OpenStudy (anonymous):
it's gonna be 42 correct? and yea i jjust gotta keep working on it
OpenStudy (phi):
yes
OpenStudy (anonymous):
::D whoop whoop i get it thxs
jimthompson5910 (jim_thompson5910):
yes,
x/3 = 17.5/5
5x = 3*17.5
5x = 52.5
x = 52.5/5
x = 10.5
So AC = 10.5
So the perimeter is 14+17.5+10.5 = 42
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