miyahvictoria
19.05.2021 •
Mathematics
If triangle fed is congruent to triangle bec, which is true by cpctc?
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Ответ:
The answer 90 degrees.
Step-by-step explanation:
DE^2 = 1 + 16 = 17.
EF^2 = 16 + 1 = 17.
DF^2 = 9 + 25 = 34.
Since (DE)^2 + (EF)^2 = (DF)^2,
angle E is 90 degrees.