Question

Q13 lines and angles do step by step will be marked as brainliest

Answer 1

to prove- angle BEC=1/2BAC

prove = angleACD - angle BEC =angle BAC - 1equation

angle ECD = angle BEC+angle EBC

angle ECD - angle EBC= angle BEC- 2 equation

angle ECD=1/2angle ACD- 3 equation

( EC is bisector of angle ACD)

angle EBC= 1/2angle ABC- 4 equation (EB is bisector of angle ABC)

from equation 2,3,4

1/2angle ACD - 1/2angle ABC = angle BEC

1/2(angle ACD - angle ABC)=angle BEC

1/2angle BAC= angle BEC(from equation 1)

hence proved..

hope you will understand you write the sign of angle in the place of word angle.

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