Ratio equivalent to 5:3​

Does the point (1, sqrt 7) lie on circle shown.

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)

Alogical argument that is presented in graphical form using boxes and arrows is called?