MCQ
In a parallelogram $\angle{\text{A}}:\angle{\text{B}}=1:2$ Then, $\angle\text{A}=$
  • A
    $30^\circ$
  • $60^\circ$
  • C
    $45^\circ$
  • D
    $90^\circ$

Answer

Correct option: B.
$60^\circ$

$\angle{\text{A}}+\angle{\text{B}}=180^\circ$
$\angle{\text{A}}:\angle{\text{B}}=1:2$
Stun of the ratios $= 1 + 2 = 3$
$\therefore\angle\text{A}=\frac{1}{3}\times180^\circ=60^\circ$

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