Two of the angles in a triangle measure 56° and 21°. What must be the measure of the third angle?
2 answers:
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Substitution.
Here is an example.
Let x be equal to 3 and y equal to 3.
From this we can conclude that the values of both x and y are equal to three therefore x and y have the same value and are equal.
Here in your case we have:
Hope this helps.
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