270° is how much of a circle? how can this be written as a fractional part of a circle?

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In the given triangle, ∠aed ∼ ∠ abc, ad = 6.9, ae = 7.2, de = 5.2, and bc = 10.2. find the measure of bd and ce. round your answer to the nearest tenth.

What additional information could be used to prove abc =mqr using sas? check all that apply.