Question

Help me for any of these...please it's urgent..

Answer 1

ans 6
let one angle be  x
adjacent angle will be  2x/3
angles on a line in parallelogram is equal to 180 degress
then
x + 2x/3 = 180
after equating we get x=108 degrees
then the 2 angles are 108 degrees and 72 degrees

Answer 2

Answer Q 2. Opposite Angles of a parallelogram are equal. 
let the Angles be x, 5x.x + x+ 5x+ 5x = 360=> 12x = 360 => x = 30
x= 30 and 5x = 150

 Answer 4---  In a rhombus ABCD
Let ∠B = 50°In ABCD,
∠A + ∠B+ ∠C +∠D = 360°
2∠A = 260 ⇒ ∠A = 130°
In ΔAOB, 
∠ABO= ∠B/2 = 50/2 = 25°
∠BAO = ∠A/2 = 130/2 = 65°
∠AOB = 180 - 65-25 = 180 - 90 = 90°