Dos ángulos opuestos por el vértice pueden ser complementarios

What is the approximate total length of iron edging needed to create the square frame and the two diagonals?

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.

How do i do this activity, is appreciated