This question was asked in Theorem 8.5
Can't we prove theorem 8.5 using theorem 8.1 that states ' diagonal of a paralleogram divides it into two congruent triangles" ? 
I meant to say : 
1.Draw the diagonal
2.Based on given data, prove that 2 triangles are congruent. 
3.Atlast say " as the diagonal divides the given figure into two congruent triangles it is a paralleogram."
Is my method correct??
Devansh Tanwar's image
Devansh Tanwar
Nov. 12, 2017, 8 p.m.