therefore angle R equals angle S
therefore angle r equals angle s .
ð ɛ ɹ f oː ɹ WORD_BOUNDARY æ ŋ ɡ ə l WORD_BOUNDARY ɑː ɹ WORD_BOUNDARY iː k w ə l z WORD_BOUNDARY æ ŋ ɡ ə l WORD_BOUNDARY ɛ s WORD_BOUNDARY
t h e r e f o r e WORD_BOUNDARY a n g l e WORD_BOUNDARY r WORD_BOUNDARY e q u a l s WORD_BOUNDARY a n g l e WORD_BOUNDARY s WORD_BOUNDARY