Evaluation of the Existing Geometric Proportions in the Beauty of Historical Bridges of East Azerbaijan from Safavid to Pahlavi

The role of proportions in architecture is undeniable throughout history, and the researcher has succeeded in introducing a proportional evaluation system with 11 stages and 9 proportional systems including: basic and multiple modules, proportions The golden rectangle, golden spiral, circles following the ratio of 1:618/1, Platonic rectangle, radical ratios, golden ratio, Le Corbusier's modular system and the proportions of Caen and Shako have been analyzed proportionally. This research has been carried out with the aim of extracting and classifying the existing geometric proportions in the selected bridges from the Safavid to Pahlavi periods, as well as classifying and prioritizing them. The causal-comparative research method and the strategy of answering the comparative question, which are scored based on the relevant observations and based on the observation of the extraction package and the visible items, are then entered into the SIGMAPLOT software to check the factor contribution and present the regression relationship. The linear regression relationship Y=ax+b is presented. The observations are collaborative and with the approach of compiling a balance sheet, and the sampling of bridges is targeted and with entry and exit criteria. The results show that the greatest role in creating the beauty of the selected bridges of East Azerbaijan is the golden ratio with a value of (1.000) and the least is related to Le Corbusier's modular with a value of (0.195).