Q. Which of the following is a parallelogram:-

Option
(a)130,50,130,50(angle in deg)
(b)120,30,130,20
(c)90,90,90,90
(d)a & c

• (d)a & c
  
  sum of adjacent angles is 180 degrees.
• 13 years agoHelpfull: Yes(5) No(0)
• Ans. (d) a & c
  
  In these diagrams
  
  (1)opposite angles are congruent, and
  
  (2)consecutive angles are supplementary i.e their sum is 180 degrees
• 12 years agoHelpfull: Yes(1) No(0)
• option D
  
  sum of the angles is 360
• 13 years agoHelpfull: Yes(0) No(1)