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Sagot :

Answer:

In a total triangle, there are 180 degrees.

So we add the given degrees and add a variable(our unknown value) to make it equal 180

65 + 57 + X = 180

add like terms

122 + X = 180

inverse property of addition is subtraction

-122       -122

X = 58 degrees

Favoristhebestidn

Answer:

The answer is 58.

Step-by-step explanation:

65+57=122

180-122=58

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