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what is 550,000 written in scientific notation?

Identify the translation rule on a coordinate plane that verifies that square a(-4, 3), b(-4, 8), c(-9, 3), d(-9, 8) and square a'(-3, 2), b'(-3, 7), c'(-8, 2), d'(-8, 7) are congruent.

If chord ab is congruent to chord cd, then what must be true about ef and eg?

Having a hard time understanding this question (see attachment).