Question

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Answer 1

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as per the therom of parallelogram that the diagnol of a parallelogram bisect each other.

therefore, AO=OC AND BO=OD  

therefore BO=1/2BD

S0,BO=6.8CM  

SIMILARLY AO=1/2AC

SO,AO=3.4

Answer 2

i)AO is obviously equal to CO as the diagonals of a IIgm bisect each other.

So, AO=4 cm

ii)From above, we got that the diagonals of a IIgm bisect each other.

So, AC=2 OC

AC=2*4=8 cm

iii)A/q, BD=AC+5

or  BD=8+5

or  BD=13 cm

iv)As the diagonals of a IIgm bisect each other. So,BO=1/2*BD

or  BO=13/2

or  BO=6.5 cm