In the figure below, segment AC is congruent to segment AB.
Which statement is used to prove that angle ABD is congruent to angle ACD?
Answer
Angle CAB is congruent to angle CBA.
Angle DAC is congruent to angle DAB.
Triangle ACD is similar to triangle ABD.
Segment AD is congruent to segment AC.
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OpenStudy (anonymous):
OpenStudy (anonymous):
ok im not gonna lie but im really stumped on like 6 questions and its a 60 question test and im supose to be done in 20 min.. is there anyway you can help
jimthompson5910 (jim_thompson5910):
well this is definitely an isosceles triangle
jimthompson5910 (jim_thompson5910):
but the problem is that we don't know the angle ADC
jimthompson5910 (jim_thompson5910):
so we can't say for sure that DAC = DAB....but if ADC = 90, then we can
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jimthompson5910 (jim_thompson5910):
basically the whole proof hinges on this
jimthompson5910 (jim_thompson5910):
so you can see the dilemma
OpenStudy (anonymous):
ya.. i get that somewhat
jimthompson5910 (jim_thompson5910):
but through the process of elimination, the other choices are completely false as well...so I guess ADC = 90 afterall
OpenStudy (anonymous):
because it is bisecting?
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jimthompson5910 (jim_thompson5910):
no, it's just an assumption since this problem is missing that critical piece of info
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
so #3
jimthompson5910 (jim_thompson5910):
no
OpenStudy (anonymous):
2
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