Idiot\'s Guides Basic Math and Pre-Algebra

Index 353

straight, 156

supplementary angles, 157

vertical, 157

area formulas, irregular

f ig ures, 229-233

circles

angles, 206

area, 208-209

circumference, 208-209

congruent triangles, 237

data sets

central tendency, 276-280

dividing, 281-283

spread measurements,

283-286

indirect measurements (similar

triangles), 238-240

lines

coordinates, 154-155

rulers, 154

polygons

area , 194 -196

sum of angles, 193-194

quadrilaterals

area formula, 188-191

perimeters, 188

ratios, 85

similar triangles, 238

solids

cones, 224-225

cylinders, 222-224

prisms, 215-219

pyramids, 219-222

spheres, 225-226

surface area, 214

volume, 214

triangles

a r e a , 178 -179

perimeters, 178

trigonometric ratios,

240-24 4

lines, 152

circles, secants and tangents,

204-207

endpoints, 153

graphs

drawing guidelines, 270-271

reading, 272-274

usage guidelines, 270

measurements, 154 -155

parallel, 159-160

angle formations, 160-161

slopes, 162-163

transversals, 160

perpendicular, 159-160

bisectors, 159

slopes, 162-163

rays, 153

angle formation, 153-154

segments, 153

chords, 200-203

congruent, 156

slope, 141-142

long column addition, 17

long division, 28-30

M

major arcs, 198-199

mean absolute deviation, 285

means (proportions), 86, 276-277

cross-multiplication, 87-88

measurements

angles, 155-158

acute, 156

adjacent, 157

complementary angles,

156 -157

congruent angles, 156

obtuse, 156

protractors, 155

right, 156

intercept-intercept graphing
met hod, 14 0 -141
interest
APR (annual percentage rate),
93
I = Prt formula, 93-94
percentages, 92-94
principals, 93
simple interest, 93
interquartile range
measurements, 284
inverse operations, 21
I = Prt formula, 93-94
IQR. See interquartile range
measurements
irrational numbers, 80-81
irregular figures, area formulas,
229-233
isosceles trapezoids, 187
isosceles triangles, 170-171

L

lateral area (prisms), 217
lattice multiplication, 27
LCM (least common multiple),
54-55
like terms (variables)
addition and subtraction
problems, 113-114
combining, 112-113
linear equations, graphing
horizontal lines, 144
intercept-intercept method,
14 0 -141
plotting points, 136-139
vertical lines, 144
y-intercept and slope method,
141-14 4
linear pair angles, 157