Answer:
The letter "x" is often used in algebra to mean a value that is not yet known. It is called a "variable" or sometimes an "unknown".
Answer:
the answer is 0,-180
Step-by-step explanation:
Answer:
B: m∠1 + m∠3 = m∠2
Step-by-step explanation:
The sum of a triangle is 180° so all of the angles in the triangle are equal to 180°. It is not possible for 2 of the angles in a triangle to be equal to the other angle in the triangle.
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