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3 years ago

ABCD is a kite.

Mathematics

2 answers:

stepan [7]3 years ago

3 0

Answer:

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

Alex17521 [72]3 years ago

3 0

Answer:

50°

Step-by-step explanation:

ABCD is a kite.

Therefore, AB = BC

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

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3 years ago

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Ainat [17]

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