चित्र में, यदि `angle x = angle y` और AB = BC हों, तो सिद्ध कीजिए AE = CD होगा ।

Explanation

`angle x = angle y rArr angle BDC = angle AEB`
`Delta ABE` तथा `Delta CBD` में,
`{:(AB=BC","angle B = angle B"," angle BDC = angle AED),(therefore " " ABE ~= Delta CBD " " [A AS "से"]):}}`
`rArr AE = CD`