Question

Show that the diagonals of a rhombus are perpendicular to each other.


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Answer 1

Answer:

hence, the diagonal of rhombus are perpendicular to each other

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Answer 2

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⇒Given :-

ABCD is a rhombus

AC and BD are diagonals of rhombus intersecting at O.

⇒ To prove :-

∠BOC = ∠DOC = ∠AOD = ∠AOB = 90°

⇒ Proof :-

All Rhombus are parallelogram, Since all of its sides are equal.

AB = BC = CD = DA ────(1)

The diagonal of a parallelogram bisect each other

Therefore, OB = OD and OA = OC ────(2)

In ∆ BOC and ∆ DOC

BO = OD [ From 2 ]

BC = DC [ From 1 ]

OC = OC [ Common side ]

∆ BOC ≅ ∆ DOC [ By SS congruency criteria ]

∠BOC = ∠DOC [ C.P.C.T ]

∠BOC + ∠DOC = 180° [ Linear pair ]

2∠BOC = 180° [ ∠BOC = ∠DOC ]

∠BOC = 180°/2

∠BOC = 90°

∠BOC = ∠DOC = 90°

Similarly, ∠AOB = ∠AOD = 90°

Hence, ∠BOC = ∠DOC = ∠AOD = ∠AOB = 90°

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