How many lines of symmetry does an isosceles trapizm have??? Share with your friends Share 5 Chaitanya Kulkarni answered this in isosceles trapizm there is only 1 symmetry line 5 View Full Answer Santanu Sahoo answered this Dear Student, An isosceles trapezium can have only one line of symmetry. 3 Smitha answered this 1 line of symmetry 3 Ayaan Aslam answered this 1 symmetry line 1 Ashel answered this An Isosceles Trapezium has only 1 line of symmetry. 2 Aasiya Fazil answered this 1 line of symmetry . 1 Smruti Ray answered this ergrgerg 0