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tester [92]
3 years ago
14

Below are \triangle ABC△ABCtriangle, A, B, C and \triangle DEF△DEFtriangle, D, E, F. We assume that AB=DEAB=DEA, B, equals, D, E

, m\angle A=m\angle Dm∠A=m∠Dm, angle, A, equals, m, angle, D, and m\angle B=m\angle Em∠B=m∠Em, angle, B, equals, m, angle, E.
Here is a rough outline of a proof that \triangle ABC\cong\triangle DEF△ABC≅△DEFtriangle, A, B, C, \cong, triangle, D, E, F:
We can map \triangle ABC△ABCtriangle, A, B, C using a sequence of rigid transformations so that A'=DA
′
=DA, prime, equals, D and B'=EB
′
=EB, prime, equals, E. [Show drawing.]
If C'C
′
C, prime and FFF are on the same side of \overleftrightarrow{DE}
DE
D, E, with, \overleftrightarrow, on top, then C'=FC
′
=FC, prime, equals, F. [Show drawing.]
If C'C
′
C, prime and FFF are on opposite sides of \overleftrightarrow{DE}
DE
D, E, with, \overleftrightarrow, on top, then we reflect \triangle A'B'C'△A
′
B
′
C
′
triangle, A, prime, B, prime, C, prime across \overleftrightarrow{DE}
DE
D, E, with, \overleftrightarrow, on top and then C''=FC
′′
=FC, start superscript, prime, prime, end superscript, equals, F, A''=DA
′′
=DA, start superscript, prime, prime, end superscript, equals, D and B''=EB
′′
=EB, start superscript, prime, prime, end superscript, equals, E. [Show drawing.]
Answer two questions about this proof.
Mathematics
1 answer:
sweet-ann [11.9K]3 years ago
8 0
What does this mean i dont get it, simplify the question more
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