Question

plx solve qtn no.6 and 7

Answer 1

Answer:

Step-by-step explanation:

ANSWER 6

(i) ABCD is a parallelogram.

    angle DAC =  angle BCA        (Alternate interior angles)    ... (1)     And  angle BAC =  angle DCA        (Alternate interior angles)    ... (2)  

   But it is given that AC bisects A.  

    DAC = BAC                        ... (3)     From equations (1), (2) and (3), we have

   DAC = BCA = BAC = DCA                ... (4)  

   DCA = BCA  

    Hence, AC bisects C.

(ii)      From equation (4), we have

    DAC = DCA      

     DA = DC                         (side opposite to equal angles are equal)  

    But DA = BC and AB = CD     (opposite sides of parallelogram)  

     AB = BC = CD = DA        Hence, ABCD is rhombus  

AND ANSWER 7 I DON'T KNOW SRY