ABCD is a quadrilateral. then it's a parallelogram
1. angle ABC= 90
2. angle ADC=90
a) solve by any statement
b) solve only by one not by other
c) both required
d) not any is sufficient
options:-
1. a 2. b 3. c 4. d

• Can solved by both statements together,
  Parallelogram requires two pairs of parrallel sides
  if only one angle is 90 ten it may be kites also
  But two angles r 90 ,that means it is sqare,n sqare is parrallelogram
• 9 years agoHelpfull: Yes(5) No(0)
• both statement are required..
  here ,
  ----->properties of parallelogram
  
  *There are six important properties of parallelograms to know:
  *Opposite sides are congruent (AB = DC).
  *Opposite angels are congruent (D = B).
  *Consecutive angles are supplementary (A + D = 180°).
  *If one angle is right, then all angles are right.
  *The diagonals of a parallelogram bisect each other.
  *Each diagonal of a parallelogram separates it into two congruent triangles
• 9 years agoHelpfull: Yes(2) No(0)
• D.
  parallelogram doesn't have any 90* angle.
• 9 years agoHelpfull: Yes(1) No(1)
• solved by any statement becoz if one angle is 90 then is opposite angle must be 90(oppositeangles are equal in parallogram) then sum of adjecents side angles is equal to 180.
• 9 years agoHelpfull: Yes(0) No(2)
• Ans : C) both required
• 9 years agoHelpfull: Yes(0) No(2)
• both statements are required because quadrilateral is just a closed figure comprised of 4 sides ...there is no rule regarding angles for quadrilateral .....rules come in existence when the type of quadrilateral is specified,....
• 9 years agoHelpfull: Yes(0) No(2)
• opt c both required
• 9 years agoHelpfull: Yes(0) No(2)