MCQ
In a parallelogram $ABCD$, angle $A$ and angle $B$ are in the ratio $1 : 2$. Find the angle $A$.
  • $60^\circ$
  • B
    $90^\circ$
  • C
    $30^\circ$
  • D
    $45^\circ$

Answer

Correct option: A.
$60^\circ$

As we know, the sum of adjacent angles of a parallelogram is equal to $180^\circ $ and opposite angles are equal to each other.
Thus, in parallelogram $ABCD$ angle $A$ and angle $B$ are adjacent to each other
Let angle $A = x$ and angle $B = 2x.$
So, $x + 2x = 180^\circ $
$3x = 180^\circ $
$x = 60^\circ $

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