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abhay kumar

· started a discussion

· 1 Months ago

abhay (Question: 259936.0 )

sir why have your taken cos 120 in place of cos 60

Question:

ABCD is a parallelogram with ∠ABC = 60º. If the longer diagonal is of length 7 cm and the area of the parallelogram is  1532    cm2, then the perimeter of the parallelogram (in cm) is :

Options:
A)

14 cm

B)

15 cm

C)

16 cm

D)

18 cm

Solution:

Ans: (c)

  

sabbavarapu madhu

· commented

· 1 Months ago

YES DIAGONAL WILL BE 'BD' SIDE OPPOSITE TO LARGER ANGLES

Sagar Sharma

· commented

· 1 Months ago

longer diagonal will be BD not AC
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