AB B find SolutionSince angle opposite to the equal sides of

Solution

Since angle opposite to the equal sides of an isosceles triangle is equal

Hence <BAD = <BDA = y (let) ......(i)

then x + 2y = 180^o   ...........(ii)

Also <A + <B + <C + <D =360^o   .........(iii)

<DBC + <CDB = 180 - 115 = 65^o  .........(iv)

y + <B = 115^o   ..........(v)

On solving all the equation we get x =50^o