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Gravity
Terms in this set (61)
open shape
NOT a polygon-does not connect
closed shape
no opening.
polygon
straight sides, no opening, at least 3 sides
quadrilateral
polygon with 4 sides and 4 angles
trapezoid
polygon with 4 sides and 1 pair of parallel lines
parallelogram
polygon with 2 pairs of parallel lines where opposite sides are equal
rhombus
parallelogram with all sides the same length
rectangle
a parallelogram with 4 right angles
square
strictest form of polygon. it is a quadrilateral, trapezoid, parallelogram, rhombus and rectangle
pentagon
5 sided polygon
hexagon
6 sided polygon
octagon
8 sided polygon
decagon
10 sided polygon
equilateral triangle
all sides are equal in this triangle
isosceles triangle
2 sides are the same length in this triangle
scalene triangle
No sides are the same length in this triangle
right triangle
one 90 degree angle within the triangle
acute triangle
all 3 angles are acute angles
obtuse triangle
1 angle is greater than 90 degrees
angle
2 rays that have the same endpoint
vertex
the common endpoint in an angle
vertices
two or more endpoints. the plural of vertex.
acute angle
an angle that measures less than 90 degrees, between 1 and 89 degrees.
right angle
'Normal Angle' - an angle that measures exactly 90 degrees
obtuse angle
an angle that measures greater than 90 degrees and less than 180 degrees
straight angle
an angle that is exactly 180 degrees
protractor
a tool used to measure angles with degrees
90 degree turn
1/4 turn
180 degree turn
1/2 turn
270 degree turn
3/4 turn
360 degree turn
full rotation
point
names an exact location using one letter
line
a straight path that goes through at least 2 points. It goes in either opposite directions forever.
line segment
a line that has two endpoints
ray
a line that has one endpoint so the other end goes on forever
parallel lines
lines or line segments that will NEVER cross
intersecting lines
lines or line segments that cross each other, but don't necessarily form a 90 degree angle.
perpendicular lines
'Normal Lines' -lines or line segments that cross and form 4 right angles at 90 degrees.
triangular prism
5 faces, 9 edges, 6 vertices 3D object where bases are the same shape
rectangular prism
3D prism with 6 rectangular faces, 12 edges, 8 vertices, where the bases are the same shape
translation
'sliding' a geometric figure from one point to another
reflection
'flipping' a geometric figure at one point
rotation
'rotating' a geometric figure about a point
perimeter
the sum of the lengths of all sides of a polygon
area
length x width represented in square units!
geometry
the study of space and shapes
plane
a flat surface that extends infinitely in all directions
180 degrees
the sum of all of the interior angles in a triangle
nonagon
9 sided polygon
heptagon
7 sided polygon
volume
length x width x height represented in cubic units "FILL THE BOX"
composite volume
find the volume of each shape and add them together
congruent
exactly the same shape and size
similar
same shape but different size
cube
6 faces, 12 edges, 8 vertices
cone
1 circular base, 1 vertex
cylinder
2 circular bases
sphere
1 circular face, infinite lines of symmetry
triangular pyramid
5 faces, 6 edges, 4 vertices 3D shape that has a triangle at the base and comes to a point
square pyramid
5 faces, 8 edges, 5 vertices, square is the base and comes to a point
triangular prism
5 faces,
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