Which of the following expressions are equivalent to this expression -1(0) = ?
0 -1[4 + (-4)]
-1[4 + (4)]
O 1 + [4 + (-4)]
O-11-4 + (-4)]

so It A -1{4 + (-4)}

Step-by-step explanation:

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according to the triangle sum theorem, all the angles in a triangle must add up to 180 degrees. if we know one angle is already 90, we do 180-90=90. the other 2 angles must add up to 90, exactly.

step-by-step explanation: