1.

In the given fig. DE || BC, LADE =70° and L BAC=50°, then angleLBCA​

Answer»

Answer:

ade=abc=70 DEGREE( CORRESPONDING angles)

bac=50 degree

abc+bac+bca=180. angle SUM property

70+50+bca=180

120+bca=180

angle bca=180-120=60



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