Idiot\'s Guides Basic Math and Pre-Algebra

352 Idiot’s Guides: Basic Math and Pre-Algebra

lines

drawing guidelines, 270-271

reading, 272-274

usage guidelines, 270

H

heptagons, 192

hexagons, 192

histograms, 266

horizontal lines, graphing, 144

I–J–K

identity equations, 129-130

idioms, 103-104

improper fractions, 59

indirect measurements

similar triangles, 238-240

trigonometric ratios, 240-244

cosine, 241-24 4

sine, 241-24 4

tangent, 241-24 4

inequalities, 130

graphing, 132, 145-146

solution sets, 132

solving, 131

inscribed angles, 201-202

inscribed polygons, 208

integers

absolute values, 39

adding signed numbers, 40-41

dividing signed numbers,

43- 4 4

multiplying signed numbers,

42-43

number lines, 38-39

subtracting signed numbers,

41- 42

lines, 152

endpoints, 153

measurements, 154 -155

midpoints, 158

parallel, 159-161

perpendicular, 159-160

rays, 153-154

segment bisectors, 158-159

segments, 153

planes, 152

points, 152

graphing

circles, 209-212

coordinate graphing, 133-146

Cartesian coordinate

system, 135

coordinates, 134

inequalit ies, 145-14 6

linear equations, 136-144

origins, 134

quadrants, 135

x-axis, 134

x-coordinates, 135

y-axis, 134

y-coordinates, 135

inequalities, 132

intercept-intercept graphing

met hod, 14 0 -141

graphs, 261

bar

drawing guidelines, 262-264

reading, 264-265

usage guidelines, 262

boxplots, 282-283

circles

drawing guidelines, 267-268

reading, 269-270

usage guidelines, 266-267

histograms, 266

fractions
addition, 64-66
changing to percentages, 92
common denominators, 64
common fractions, 58
decimal fractions
addition, 73-75
converting fractions, 78-79
division, 75-78
multiplication, 75-78
naming, 70
numbers less than one,
68-69
powers of ten, 71
scientific notation, 72-73
subtraction, 73-75
denominators, 58
division, 62-64
equivalent forms, 60-61
improper, 59
mixed numbers, 59
multiplication, 61-64
numerators, 58
proper, 59
simplifying, 61
subtraction, 64-66
frequency, relative frequency
(probabilities), 253-254

G

GCF (greatest common factor),
52-54
geometry basics
angles
bisectors, 158-159
linear pairs, 157
measurements, 155-158
example problems, 290-293