
12 Congruent Triangles
... If two coplanar lines have no point of intersection, then the lines are parallel. ...
... If two coplanar lines have no point of intersection, then the lines are parallel. ...
Chapter 1 Linear Equations in One Variable
... the laws of arithmetic. We say that two linear expressions are equivalent if we can move from one expression to the other using the laws of arithmetic. When two linear expressions are equivalent, they have the same meaning: to be precise, any number substituted for the unknown in the expression alwa ...
... the laws of arithmetic. We say that two linear expressions are equivalent if we can move from one expression to the other using the laws of arithmetic. When two linear expressions are equivalent, they have the same meaning: to be precise, any number substituted for the unknown in the expression alwa ...