(1) If ABCD is a rectangle in which the diagonal BD bisects angel B, then show that ABCD is a square.
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Answer:
Given :
- ABCD is a rectangle
- Diagonal BD bisects angel
To Prove :
- ABCD is a aquare
Solution :
ABCD is a rectangle where BD bisects ∠B
Therefore,
- AB = DC
- CB = AD
In ∆ABD and ∆BCD
AD = BC (Given)
AB = DC (Given)
∠DAB = ∠DCB (90°)
∴ ∆ABD ≅ ∆BCD (By SAS Congruency)
AD = CD (C.P.C.T)
Hence, all sides are equal
∴ ABCD is a square
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