In the given figure, side BC of tSABC is produced to form ray BD and CE 11 BA

CBSE Class 9 CBSE Class 9 Maths
1

In the given figure, side BC of tSABC is produced to form ray BD and CE 11 BA. Show that ZACD = ZA + ZB. Deduce that
ZA + ZB + ZC = 180°.
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