Idiot\'s Guides Basic Math and Pre-Algebra

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

x-axis, 134

x-coordinates, 135

y-axis, 134

y-coordinates, 135

coordinate planes (circles),

209-212

coordinates, 134

line measurements, 154 -155

x-coordinates, 135

y-coordinates, 135

corresponding angles, 160

cosine

SOHCAHTOA memory

device, 241

trigonometric ratios, 241-244

counting methods (probabilities)

basic counting principle,

248-249

combinations, 251-252

permutation, 249-251

counting numbers, 4

cross-multiplying proportions,

87-88

cubes, 215

cylinders, 222-223

surface area, 223-224

volume formulas, 223-224

D

data set measurements

central tendency

means, 276-277

medians, 277-279

modes, 279-280

dividing

boxplots, 282-283

quartiles and percentiles,

281-282

common denominators, 64

common fractions, 58

commutative property (addition),

18

complementary angles, 156-157

composite numbers, 46-47

compound event probabilities,

255-258

“and” probabilities, 256-257

“or” probabilities, 257-258

concave polygons, 230

concentric circles, 199

cones, 224

surface area, 224-225

volume formulas, 225

congruency

angles, 156

polygons, 234

segments, 156

triangles, 234 -236

finding missing

measurements, 237

minimum requirements,

235-236

converting fractions, 78-79

convex polygons, 230

coordinate graphing, 133

Cartesian coordinate system,

135

coordinates, 134

inequalit ies, 145-14 6

linear equations

horizontal lines, 144

intercept-intercept method,

14 0 -141

plotting points, 136-139

vertical lines, 144

y-intercept and slope

method, 141-14 4

origins, 134

quadrants, 135

C

Cartesian coordinate system, 135
centers (circles), 198
central angles, 200-202
central tendency measurements
means, 276-277
medians, 277-279
modes, 279-280
charts, power of ten, 8
chords, 200-203
diameters, 200-201
circles, 197-200
angles
central angles, 200-202
formation by secants and
tangents, 204-207
inscribed angles, 201-202
measurement rules, 206
arcs , 198 -19 9
area, 208-209
centers, 198
chords, 200-203
diameters, 200-201
circumference, 208-209
concentric, 199
coordinate planes, 209-212
graphing, 209-212
graphs
drawing guidelines, 267-268
reading, 269-270
usage guidelines, 266-267
lines, secants and tangents,
204-207
radius, 198
semicircles, 198
tangents, 199
circumference (circles), 208-209
circumscribed polygons, 208
combination counting method
(probabilities), 251-252