Terminology Units Flashcards
What is commutative law?
The law that means multiplication and addition can differ in order (a+b=b+a)
what is associative law?
Meaning it does not matter which two numbers are added first as shown in this expression. 4+3+2
what is partitioning?
Grouping adjacent digits to make the equation shorter.
Compensating
Rounding a number to the nearest ten or hundred to make an equation easier. The number added to the round is then subtracted.
distributive law
Expanding equations to make them easier to solve. 6x21 = (6x 20)+ (6+1)
What is a line with two arrows at each end
a line that extends infinitly
What is a plane
a flat surface that extends infinitly
if three or more points lie on a line they are
collinear
if three or more lines meet at the same point, they are …
concurrent
a line with a fixed length is a
line segment
a line that only extends infinitely at one end, it is …
a Ray
adjacent means
next to one another
lines are perpendicular if they …
create 90 degrees
two angles that add to 90 degrees are
complementary angles
angles that add to 180 degrees are
supplementary angles
