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umka21 [38]
3 years ago
9

How can they been proven congruent ?

Mathematics
1 answer:
telo118 [61]3 years ago
7 0
The two angles marked are congruent.
That is one pair of congruent angles.   ------->    A
Then the vertical angles are congruent.
That is a second pair of congruent angles.    -------> A
Finally, we have the two sides marked congruent.
That is one pair of congruent sides.    ------> S

Put together what we have above, and it gives us AAS.
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