Question

find the value of x in the chapter triangles ​

Answer 1

Answer:

i) /_B = /_C [ As the adjacent angles of equal sides are equal]

x = 40°

ii) /_ABC = /_ACB [ As the adjacent angles of equal sides are equal]

/_ACB + /_ ACD = 180° [Sum of interior and exterior angle is supplementary or 180°]

/_ACB + 120° = 180°

/_ ACB = 180°-120°

/_ACB = 60°

x = 60°