Semester Exam Review
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48 Terms
point
a location in space
line
You need 2 points to label this object.
plane
You need 3 points to label this object.
ray
a part of a line that starts at an endpoint and extends forever in one direction
line segment
part of a line with two endpoints
angle
formed by two rays with the same endpoint
Point A
Where do the 2 lines intersect?
Point C
Where do the line and place intersect?
Line AB
Where do the 2 planes intersect?
collinear
points that lie on the same line
coplanar
points that lie in the same plane
midpoint / midpoint formula
A point that divides a segment into two congruent segments
distance / distance formula
The length of a path between two points
linear pair
2 angles that form a line
supplementary angles
two angles whose measures add to 180 degrees
complementary angles
two angles whose measures add to 90 degrees
vertical angles
A pair of opposite congruent angles formed by intersecting lines
acute angle
an angle that measures less than 90 degrees
right angle
an angle that measures 90 degrees
obtuse angle
An angle that measures more than 90 degrees but less than 180 degrees
straight angle
an angle that measures 180 degrees
congruent
angles or line segments that have the same measure
segment addition
part + part = whole
angle addition
part + part = whole
alternate interior angles
equal / congruent
alternate exterior angles
equal / congruent
same-side interior angles
add to 180 degrees
corresponding angles
equal / congruent
parallel lines
lines that never cross
transversal
a line that intersects two or more lines
translation
"slide"
reflection
"flip"
rotation
"turn"
parallel lines
same slope
perpendicular lines
opposite reciprocal slopes
slope
rise / run
angles INSIDE triangles
add to 180
angles OUTSIDE triangles
outside angle = far angle + far angle
isosceles triangle
a triangle with 2 congruent sides and 2 congruent base angles
equilateral triangle
a triangle with 3 congruent sides and 3 congruent angles
CPCTC
Corresponding Parts of Congruent Triangles are Congruent
SSS
Side-Side-Side
SAS
Side-Angle-Side
AAS
Angle-Angle-Side
ASA
Angle-Side-Angle
HL
Hypotenuse-Leg
Triangle Inequality Theorem
Small Side + Medium Side > Big Side
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