How to determine if Triangles are Congruent? If they are, how do you know if they are SSS or ASA or SAS or AAS?

Essentially, how do I apply the different congruent thermos to the questions attached?

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

Which is the equation of an ellipse with directrices at x = ±4 and foci at (2, 0) and (−2, 0)?

2. using calculations based on a perpetual inventory system, determine the inventory balance altira would report in its august 31, 2021, balance sheet and the cost of goods sold it would report in its august 2021 income statement using the average cost method. (round "average cost per unit" to 2 decimal places.)