Question

सिद्ध कीजिए कि त्रिभुज के तीनों अंतः कोणों का योग 180 अंश होता है

Answer 1

AB + BC + CD = 180
For the equilateral triangle have three equal side 60 so. 60 +60+60= 180

Answer 2

Answer:

i added an image so that you can understand it very well.