realizing the significance of complex numbers will be an impetus for future teachers to pay more attention when teaching certain contents in secondary education, adoption of the application of complex numbers in Euclid's plane geometry provides future teachers with a strong analytical apparatus which can be used in secondary education while working with talented students, and this subtle example of interdisciplinary integration positively influences future teachers to continually take care of interdisciplinary integration of teaching Proposal for better integration of complex numbers and Euclid's plane geometry