names a location, has no dimension
point
names a straight path of points in a plane. Has no width or thiccness, continues forever in one dimension
line
a flat surface, has no thiccness, extends forever in two dimensions
plane
a point at th an end of a segment or the starting point of a ray.
endpoint
a part of a line that starts at an endpoint and extends forever in one direction.
ray
part of a line consisting of two endpoints and all points between them
line segment
Which point should be first when naming a RAY
the endpoint
which point should be first when naming a LINE SEGMENT or a LINE
either
points are __________ if they lie on the same line
collinear
__________ between two points is a measure of the length of the shortest line segment that would connect them. ________is not defined until a unit of measure has been chosen.
Distance
things are ________ if they lie in the same plane
coplanar
a ___________ is a statement that is accepted as true without proof.
postulate
_______________ allows you to say segments have the same length without knowing they have the same length
congruency
two segments that have the same length are ___________
congruent
the congruence symbol is
≅
to ________ a figure is to divide it into two congruent parts
bisect
the __________ of a segment is the point that bisects the segments into two congruent segments
midpoint
midpoint formula
(x₁+x₂)/2, (y₁+y₂)/2
to name a plane, you cannot pick more than two points that lie on the same line. say ok
ok
How many degrees do complementary angles add up to
90°
How many degrees do supplementary angles add up to
180°
a closed plane figure made up of three or more line segments that intersect two other segments at their endpoints
polygon
when all the sides and angles of a polygon are congruent
regular
What is a 5 sided polygon?
pentagon
What is a 6 sided polygon?
hexagon
What is a 4 sided polygon?
quadrilateral
What is a 3 sided polygon
triangle
What is a 7 sided polygon called?
heptagon
what is an 8-sided polygon
octagon
what is a 9-sided polygon
nonagon
surface contained within the boundaries of a two-dimensional object like a trapezoid or octagon
area
distance all the way around the figure
perimiter
Pythagorean Theorem
a²+b²=c²
What is C in the Pythagorean Theorem?
hypotenuse
Distance Formula
d = √[( x₂ - x₁)² + (y₂ - y₁)²]