remark on the fourth postulate - aren't all straight angles(180.) equal?
this statement can be proved on the basis of fourth postulate; since all right angles are equal, its obvious that the sums of two right angles (a straight angle) are equal!
remark on the fourth postulate - aren't all straight angles(180.) equal?
this statement can be proved on the basis of fourth postulate; since all right angles are equal, its obvious that the sums of two right angles (a straight angle) are equal!