What is the greatest common factor of 81 and 18

The common factors of 81 and 18 are 1, 3, and 9.

Therefore the GCF of 81 and 18 is 9.

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The common factors of 81 and 18 are 1, 3, and 9.

Therefore the GCF of 81 and 18 is 9.

{3 + i, 3 - i, 3, -1}

step-by-step explanation:

ca = ec

cpctc makes it so that corresponding parts of the triangle you proved to be equal are equal, the other options aren't part of the part of the triangles you proved to be equal.