Question

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Plzzz answer above question.
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Answer 1

Answer:

Since two opposite angles are equal to 90 degree so rest angles will also be 90 degree and hence it will be a rectangle .

Since all angles in a rectangle are right angles .

So, In ΔABC

AC2 = AB2 + BC2  (Pythagoras Theorem)

⇒ 2AC2 = 2(AB2 + BC2)

⇒ AC2 + AC2 = AB2 + BC2 + AB2+ BC2

⇒ AC2 + BD2 = AB2 + BC2 + CD2+ AD2  (opposite sides of a rectangle are equal and diagonals of a rectangle are equal)

2AC2  = AB2 + BC2 + CD2+ AD2

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