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68 Cards in this Set

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Geometry
the mathematical study of space and objects in space
Protractor
a tool used to measure angles
Coordinate Grid
a device for locating points in a plane using ordered numbered pairs, or coordinates
Compass
a tool used to draw circles
Endpoints
a point at the end of a line segment or ray. A line segment is normally named using the letter labels of its endpoints
Degree
unit of measure used for the size of an angle
Line Segment
a straight path joining two points
Line
a straight path that extends infinitely in opposite directions
Ray
a straight path that extends infinitely from its endpoint
Intersect
lines that meet
Parallel
two lines, line segments, or rays, next to each other that can never cross
Perpendicular
two lines that intersect at right angles
Right Angle
a 90 degree angle
Obtuse Angle
an angle between 90 & 180 degrees
Acute Angle
an angle between 0 & 90 degrees
straight angle
an angle that measures 180 degrees
reflex angle
an angle between 180 and 360 degrees
vertex
the point where the rays of an angle, the sides of a polygon, or the sides of a polyhedron meet
polygon
a 2 demensional figure with 3 or more sides. All sides must be closed and none curved.
regular polygon
a polygon with all sides and angles the same size
interior
the inside
convex
all sides pushed out
concave
all sides pushed in
side
one of the line segments that makes up a polygon
triangle
a polygon with three sides
quadirlateral
a polygon with four sides
pentagon
a polygon with five sides
hexagon
a polygon with six sides
heptagon
a polygon with seven sides
ocgtagon
a polygon with eight sides
nonagon
a polygon with nine sides
decagon
a polygon with ten sides
scalene triangle
a triangle with all sides different
isosceles triangle
a triangle with two sides are the same
equilateral triangle
a triangle with three sides the same
right triangle
a triangle with a right angle
acute triangle
a triangle with all angles are acute
obtuse triangle
a triangle with one obtuse angle
parallelogram
a quadrilateral shape with two parallel sides
trapezoid
a quadrilateral shape with one pair of parallel sides
rhombus
a quadrilateral shape with all sides the same length
rectangle
a parallelogram with four right angles
square
a parallelogram with four equal sides and angles
kite
a quadrilateral with two pairs of adjacent equal sides. The sides cannot be of equal length, so a rhombus cannot be a kite.
radius
connects the center of the circle with any point on the circle
diameter
passes through the circle and has endpoints on the circle
center
middle of the circle
arc
part of the outline of a circle
face
a flat surface
edge
where surfaces meet
base
the bottom
cube
a polyhedron with six square faces, 12 vertices and 8 edges
triangular prism
a prism whose bases are triangles
rectangular prism
prism with rectangular bases
cone
a three dimensional shape with a circular base and one vertex called the apex
pyramid
traingular prism or tetrahedron
cylinder
a three dimensional shape that has two circular bases that are parallel and conguant and connected by a curved surface.
sphere
a set of all points in space a given distance from a given point. The given point is the center of the sphere, the given distance is the radius.
congruent
exactly the same shape and size
similar
exactly the same shape but not necissarily the same size
symmetry
the same
line of symmetry
line drawn through a figure
image
reflection of an object
pre-image
the original image before a transformation
reflection
the flipping of a figure over a line
rotation
turns
transition
a movement of a figure along a straight line
transformation
an operation on a figure that produces another figure