2) Why is the value of t on the vertical line, that is, AP=AQ, then AP=8, CQ=CE=4t, then AQ=8, and the equation 3-4t=8, then T is solved.
3) When APQ is a right angle, AQ= 16 radical 3/3=8 radical 3-4t.
When AQP is a right angle, then AQ=4 radical 3=8 radical 3-4t.