Using the information given in the figure, the values of x and y are ___________.
Options:
A .  x=56°,y=76∘
B .  x=48∘,y=56∘
C .  x=48∘,y=76∘
D .  x=76∘,y=56∘
Answer: Option B : B Consider △ABC and △ADC (i) AB = CD ...... (given) (ii) BC = DA...... (given) (iii) AC = AC ...... (common) ∴△ABC≅△CDA ... (SSS Postulate) ⇒∠ABC=∠CDA ..... (CPCT) ∴x=48∘ ⇒∠BCA=∠DAC ......(CPCT) ∴y=56∘
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