4 Variables & Ratios

Section 4.1

4.1.1 Introduction to Variables

4.1.2 Writing Equivalent Expressions

4.1.3 Using Variables to Generalize

Section 4.2

4.2.1 Enlarging Two-Dimensional Shapes

4.2.2 Enlarging and Reducing Figures

4.2.3 Enlargement and Reduction Ratios

4.2.4 Ratios in Other Situations

Review Key Ideas

4.1.1 Variables, dividing, decimal division

4.1.2 Equivalent expressions, mixed numbers, improper fractions

4.1.3 Algebraic expression, evaluating, add mixed numbers

4.2.1 Enlarging shapes

4.2.2 Enlarge, reduce, vertices, vertex, substitution

4.2.3 similar, ratio, perimeter, area

4.2.4 Ratios