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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


preimage

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
