Question

please answer this question right i follow you and give you 10 thanks and do not give irrevalent answer otherwise i report your 20 answer questions(class 7th)​

Answer 1

Answer:

angel CBA -50 Degree.

angel ACB -50 Degree

Answer 2

As angle <ACB and <ACD lie on a straight line next to each other

              <ACB+<ACD =180

from given <ACD=130

           <ACB = 180-130=50

   Now we know that in a triangle sum of angles are 180

<ABC+<ACB+<BAC = 180

<ABC+ 50 + 80 = 180

<ABC = 50

For a triangle to be isoceles two of the angles of the triangle have to be same

As <ABC = <ACB= 50 triangle ABC is an isoceles traingle

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