State what additional information is required in order to know that the triangles are congruent for the reason given​

The tiles below are pieces of a normal ecg tracing representing a little less than two heartbeats at a resting rate of 80 bpm. arrange the tiles in their correct order. rank from first to last. do not overlap any tiles.

Evaluate the following expression 1/3^2

Two lines parallel to the same plane are parallel to eachother