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Question


If ABCD is a parallelogram then which of the following is not true?

A
CD=4 cm & BC=3 cm
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B
mB=60
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C
mD=120
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D
mC=60
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Solution

The correct option is B mB=60
  • As we know opposite sides of a parallelogram are equal
AB=CD=4 cm & BC=DA=3 cm
  • We also know that opposite angles of a parallelogram are equal.
mA=mC=60
  • Sum of adjacent angles of a parallelogram is 180
mA+mB=180mB=180mAmB=18060=120

mB=mDmD=120

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