supplementary angles (suhp-luh-MEN-tuh-ree
ANG-guhlz) Two angles with a sum of 180. (p. 244)
surface area of a cone (SUR-fiss AIR-ee-uh
UHV UH KOHN) The sum of the lateral area
and the area of the circular base. (p. 311)
surface area of a cylinder (SUR-fiss AIR-ee-uh
UHV UH SIL-uhn-dur) The sum of the lateral
area and the area of the two congruent circular
bases. (p. 310)
surface area of a prism (SUR-fiss AIR-ee-uh
UHV UH PRIZ-uhm) The sum of the areas of
the faces of a prism. (p. 306)
surface area of a pyramid (SUR-fiss AIR-ee-uh
UHV UH PEER-uh-mid) The sum of the lateral
area and the area of the base. (p. 308)
survey (SUR-vay) An examination of public
opinion, attitudes, or behavior. (p. 208)
symmetry (SIM-uh-tree) See line symmetryand
point symmetry.
T
tangent (TAN-juhnt) A line in the plane of a circle
that intersects the circle at exactly one point.
(p. 263)
terminating decimal(TUR-muh-nayt-ing
DESS-uh-muhl) A decimal that has a finite
number of decimal places. Every terminating
decimal can be written as a fraction having a
denominator that is a power of 10. (p. 72)
terms(TURMZ) 1. The parts of an expression
separated by plus or minus signs. (p. 32) 2. The two
quantities being compared in a ratio. (p. 148)- The numbers in a sequence. (p. 352)
tessellation (tess-uh-LAY-shuhn) The covering of a
plane with congruent copies of the same figure,
with no overlap or gaps. (p. 292)
tetrahedron (te-truh-HEE-druhn) A polyhedron
made of four triangles. Also called a triangular
pyramid. (p. 309)
theoretical probability (thee-uh-RET-i-kuhl
prob-uh-BIL-uh-tee) The number of favorable
outcomes divided by the number of possible
outcomes. (p. 334)
three-dimensional figures
(THREE-duh-MEN-shuhn-uhl FIG-yurz) Figures
that have length, width, and height. (p. 302)
time (TIME) A word that represents how long, in
years, the principal is borrowed or left on deposit.
(p. 198)
tips (TIPS) Gratuities for services provided in
places such as restaurants and hotels. (p. 193)
total cost (TOH-tuhl KAWST) The sum of an
item’s marked price and the amount of sales tax.
(p. 192)
total sales (TOH-tuhl SAYLZ) The total amount
of goods or services sold. (p. 196)
transformation (trans-fur-MAY-shuhn) A change
in orientation, shape, or size of a figure. (p. 370)
translation (trans-LAY-shuhn) A transformation
that slides every point of a figure the same
distance and in the same direction along a
straight line without turning. (p. 370)
translation tessellation (trans-LAY-shuhn
tess-uh-LAY-shuhn) The use of translations of a
figure to create a pattern. (p. 292)
transversal (trans-VUR-suhl) A line that intersects
two or more lines at different points. (p. 246)
trapezoid (TRAP-uh-zoyd) A quadrilateral with
exactly one pair of parallel sides. (p. 260)
tree diagram (TREE DYE-uh-gram) A visual
representation that shows all possible outcomes
of one or more events. (p. 330)
trial (TRYE-uhl) The name given to each round of
an experiment. (p. 336)
triangle (TRYE-ang-guhl) A polygon with three
sides and three vertices. (p. 252)
Triangle Inequality Theorem (TRYE-ang-guhl
in-i-KWOL-uh-tee THEER-uhm) The length of
the third side of a triangle is always less than the
sum of the lengths of the other two sides and
greater than their difference. (p. 255)
triangular numbers (trye-ANG-gyuh-lur
NUHM-burz) A sequence of whole numbers in
which each number corresponds to an arrangement
of dots in the shape of a triangle. (p. 354)
triangular prism (trye-ANG-gyuh-lur PRIZ-uhm)
A prism that has bases that are triangles. (p. 302)
triangular pyramid (trye-ANG-gyuh-lur
PEER-uh-mid) A pyramid, also called a
tetrahedron, that has a base that is a triangle.
(p. 302)
trinomial (trye-NOH-mee-uhl) A polynomial with
three terms. (p. 382)
two-step equation (TOO-STEP i-KWAY-zhuhn)
An equation that involves two operations. (p. 44)
U
underestimate (uhn-dur-ESS-tuh-mit) An estimate
less than the actual value. (p. 312)436 Glossary