Question

ABCD is a kite.

Answer 1

Answer:

wouldn't it be 40 if the opposite side is 40 ?

Answer 2

Answer:

50°

Step-by-step explanation:

ABCD is a kite.

Therefore, AB = BC

$\therefore m\angle BCA= m\angle BAC = 40\degree \\\because BD \perp AC.. (Diagonals \: of\: kite) \\\therefore y + 90\degree + m\angle BCA = 180\degree \\\therefore y + 90\degree + 40\degree = 180\degree \\\therefore y = 180\degree - 130\degree \\\huge\red {\boxed {y = 50\degree}}$