Please solve it.:

3. In the figure, given below, triangle ABC is right-angled at B. ABPQ and ACRS are squares. Prove that : 
(i)   ACQ and   ASB are congruent. 
(ii) CQ = BS. 

Dear Student,
As, QAC=QAB+BAC=90°+BAC ---1and,SAB=CAS+BAC=90°+BAC ---2therefore; from 1 and 2, we get;QAC=SAB ---3now,In triangles ACQ and ASB,QA=AB sides of the same squareAS=AC sides of the same squareQAC=SAB from 3Thus, ACQASB by SAS congurency rule;and,CQ=BS By c.p.c.t



Regards.

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a)SSS
b)it is also on the basis of sides
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