 | Term | Definition |
| |
Rate |
is a special kind of ration that compares 2 quanitys measured in different units example: miles per hour (mph) |
| |
Ratio |
comparison of 2 numbers by division example: 2:3 teachers for every 15 students |
| |
Proportion |
is an equation stating that 2 ratios are equal |
| |
Cross Products |
multiply the numerator of one ratio by the denominator of the other |
| |
Similar Figures |
polygons that have the same shape but not necessarily the same size. |
| |
Corresponding Angles |
angles of 2 similar polygons that are in the same relative position example: 1,2,3,4 |
| |
Corresponding Sides |
sides of similar polygons that are in the same relative position example; a,b,c,d |
| |
Percent% |
"per" "cent" out of 100 |
| |
Percent Change |
ratio of the amount of change to the orginal number |
| |
Compass |
a tool used to draw a circle |
| |
Chord |
line connecting two points of a circle |
| |
Diameter |
the distance from 1 side of a circle to they other that goes through the center |
| |
Radius |
the distance from the center to the outside of a circle |
| |
Line |
goes on forever |
| |
Line Segment |
part of a line |
| |
Ray |
part of a line with 1 end point |
| |
Angle |
formed with 2 rays with a common end point |
| |
Vertex |
common point in an angle |
| |
Adjacent Angle |
angles that share a ray and a vertex. |
| |
Vertical Angle |
angles that are opposite eachother and share a vertex |
| |
Complementary |
if the sum of the measure of 2 angles is 90 degress |
| |
Suplamentary |
if the sum of the angles are 180 degrees |
| |
Congruent Angles |
angles with the same measurement |
| |
Triangles may be classified according to |
acute, right, obtuse,and staight |
| |
Congruent Sides |
angles with same measurement |
| |
Equilateral |
3 congruent sides |
| |
Isosceles |
with at least 2 congruent sides |
| |
Scalene |
with NO congruent sides |
| |
Acute |
between 0 degrees and 90 degress |
| |
Obtuse |
between 90 degrees and 180 degress |
| |
Right |
must be 90 degress |
| |
Straight Line |
180 degrees |
| |
Plane |
flat surface |
| |
Plane geometry |
figures have only 2 dimensions |
| |
Perimeter |
the distance around a shape |
| |
Area |
the space inside a shape |
| |
Parallelogram |
2 sets of parallel sides |
| |
Trapezoid |
a 4 sided figure with 1 set of parallel lines |
| |
C/D= |
pie |
| |
C= |
piexD |
| |
perfect square |
a number that is a square of an integer |
| |
sqaure root |
the inverse(opposite) of squaring a number |
| |
Irrational number |
a decimal that neither repeats or ends. GOES ON FOREVER |
| |
Rational number |
decimal that repeats or ends |
| |
Intergers |
whole numbers and their opposites |
| |
Whole numbers |
counting numbers |
| |
Therom |
rule in math |
| |
Hypotenuse |
side across from right angle |
| |
Polyhedron |
3-D shape with flat surfaces many sides |
| |
formula for finding the area of a triangle |
a=b*h/2 |
| |
formula for finding the area of a parallelogram (rhombus) |
a=b*h |
| |
formula for finding the area of a trapezoid |
a=(b1+b2)*h/2 |
| |
formula for finding the area of a recatangle |
a=b*h |
| |
formula for finding the area of a circle |
A=3.14r2 |
| |
formula for finding the circumference of a circle |
C=3.14d |
| |
Pythagorean Therom |
a2+b2=c2 is only true for the right angle |
| |
Prism |
2 congruent and parallel bases |
| |
Pyramid |
1 base w/triangular sides that meet @ 1 pt. |
| |
Formula for finding the surface area of a cylinder |
SA=2*3.14r2+3.14dh |
| |
Linear Units |
perimeter is measured in it example cm. in. mm. ft. yd. km. mi. |
| |
Squar Units |
area is measured in it cm2. in2. mm2. ft2. yd2. km2. mi2. |
| |
volume |
the space within a shape. has to have 3 dimensions |
| |
Formula for finding volume of a prism |
v=lwh |
| |
Cubic units |
volume is measured in it example; 48 cubic units |
| |
formula for finding the volume of a cylinder |
V=3.14r2*h |
| |
sequence |
set of numbers that follow a pattern |
| |
terms |
#'s and variables seperated by addition and subtration |
| |
arithmatic |
find each term by adding the fixed number |
| |
geometric |
find each term by multiplying the previous term by a fixed # which is called common ration |
| |
common ratio |
fixed # |
| |
function |
is a relationship that assigns exactly one output for each input value |
| |
formula for function rule |
y=_x |
| |
Interval |
tells what to multiply the variale by |
| |
To determine the function rule |
1. analyze the function rule in words 2. write the function rules as an equation |
| |
Solving 2 step equations |
1. undo addition and subtraction 2. undo multiplication and division |
| |
Like terms |
are terms which have the same variable |
| |
Coefficient |
# multiplied by a variable goes in front |
| |
Communtative |
if the order is changed in addition and multiplication the answer does not change example: a+b=b+a ab=ba |
| |
Associative |
if the grouping is changed in addition or multiplication the answer does not change example: a+(b+c)=(a+b)+c |
| |
Distibutive |
can multiply a number by each number added together |
