Mathematics
20 Online
OpenStudy (anonymous):
Use the information in the diagram to determine the height of the tree. The diagram is not to scale.
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OpenStudy (anonymous):
I got 30 as my answer is that correct @jim_thompson5910
jimthompson5910 (jim_thompson5910):
Hint: this is another midsegment problem (just written differently and it's not as obvious)
OpenStudy (anonymous):
okay... so it cant be 120 and it cant be 60...reworking the problem just now i got 28
jimthompson5910 (jim_thompson5910):
how did you rule out 60
jimthompson5910 (jim_thompson5910):
|dw:1355263576185:dw|
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jimthompson5910 (jim_thompson5910):
|dw:1355263602371:dw|
OpenStudy (anonymous):
it said the diagram was not to scale so i just assumef
jimthompson5910 (jim_thompson5910):
well the tick marks show you that you're dealing with the midsegment
jimthompson5910 (jim_thompson5910):
|dw:1355263885359:dw|
OpenStudy (anonymous):
@jim_thompson5910 so 60
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jimthompson5910 (jim_thompson5910):
correct
jimthompson5910 (jim_thompson5910):
|dw:1355266594908:dw|
OpenStudy (anonymous):
can you tell me if i did this problem correctly too
jimthompson5910 (jim_thompson5910):
ok one more
OpenStudy (anonymous):
hold on it takes a little bit to write
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OpenStudy (anonymous):
Find the circumcenter of the triangle
and my answer was (–4, –2)
jimthompson5910 (jim_thompson5910):
that's incorrect
jimthompson5910 (jim_thompson5910):
hint: the circumcenter is found by finding the intersection of the perpendicular bisectors
jimthompson5910 (jim_thompson5910):
|dw:1355266989233:dw|
jimthompson5910 (jim_thompson5910):
|dw:1355267002498:dw|
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OpenStudy (anonymous):
i have no clue hoe to do this then... um the only other answer i could find was -5/2, -4
jimthompson5910 (jim_thompson5910):
find the midpoints of each side
find the equations of the perpendicular lines through these midpoints
find where the lines intersect
OpenStudy (anonymous):
oh wait its -5/2, -2
jimthompson5910 (jim_thompson5910):
yep