If you do 2+2 does it equal 22? or am i dum?

Ineed if you could explain and give me the answer you! this needs done

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

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.