show that the diagram of rhombus abcd bisecting angle c
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Given : ABCD is a rhombus, i.e., AB = BC = CD = DA.
To Prove : ∠DAC = ∠BAC, ∠BCA = ∠DCA ∠ADB = ∠CDB, ∠ABD = ∠CBD Proof : In ∆ABC and ∆CDA, we have AB = AD [Sides of a rhombus] AC = AC [Common] BC = CD [Sides of a rhombus] ∆ABC ≅ ∆ADC [SSS congruence] So, ∠DAC = ∠BAC ∠BCA = ∠DCA Similarly, ∠ADB = ∠CDB and ∠ABD = ∠CBD.
Hence, diagonal AC bisects ∠A as well as ∠C and diagonal BD bisects ∠B as well as ∠D. Proved.
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