# Shared Flashcard Set

## Details

geometry vocab
exam vocabulary terms
54
Mathematics
06/05/2011

Term
 image
Definition
 New figure
Term
 preimage
Definition
 original image
Term
 transformation
Definition
 maps preimage to image
Term
 reflection
Definition
 mirrors image, reflects on a line
Term
 Rotation
Definition
Term
 translation
Definition
 maps 2 points to primes so that they're collinear, parallel of equal
Term
 vector
Definition
 magnitude and direction
Term
 glide reflection
Definition
 a translation and a reflection
Term
 isometry
Definition
 preserves length measure and distance
Term
 initial point
Definition
 starting point
Term
 terminal point
Definition
 ending point
Term
 composition
Definition
 2 or more transformations
Term
 ratio
Definition
 a to b, 2 quantities measured in same units
Term
 proportions
Definition
 equates 2 ratios
Term
 means
Definition
 a/b=c/d B and C are means
Term
 extremes
Definition
 a/b=c/d A and D are extremes
Term
 Geometric mean
Definition
 measures are equal
Term
 similar polygons
Definition
 2 polygons w/ congruent angles, proportional
Term
 scale factor
Definition
 equal ratios of length and 2 polygons
Term
 dilation
Definition
 maps every point to its prime, gets bigger or smaller
Term
 reduction
Definition
 0
Term
 enlargement
Definition
 k>1
Term
 pythagorean triple
Definition
 a^2 + b^2 = c^2 ex. 3,4,5
Term
 trigonometric ratio
Definition
 proportional lengths of 2 side of a right triangle
Term
 angle of elevation
Definition
 looking at point in distance the angle is made by your line of sight and the horizon
Term
 magnitude of a vector
Definition
 distance from initial point to terminal point of a vector
Term
 circle
Definition
 points in a plane equidistance from a point
Term
 secant
Definition
 line intersects circle at 2 points
Term
 tangent
Definition
 line in circle intersects at 1 point
Term
 point of tangency
Definition
 point where tangent line intersects circle
Term
 central angle
Definition
 angle with vertex at center of circle
Term
 inscribed angle
Definition
 angle with vertex on circle, sides are chords
Term
 intercepted arc
Definition
 arc lies on interior of inscribed angle with points on angle
Term
 locus
Definition
 set of points that satisfies a condition(s)
Term
 diameter
Definition
 chord passes through center of circle
Term
 chord
Definition
 segment with endpoint on circle
Term
 concentric circles
Definition
 coplanar circles with common center
Term
 common tangent
Definition
 line/segment tangent to 2 coplanar circles
Term
 apothem
Definition
 distance from center of polygon to any side
Term
 sector
Definition
Term
 probability
Definition
 ratio 0:1 likelihood that something will happen
Term
 polyhedron
Definition
 solid all faces are a polygon
Term
 platonic solid
Definition
 1st 5 regular polyhedron
Term
 sphere
Definition
 locust of points in space given distance from center
Term
 lateral face
Definition
 parallelogram formed by connecting vertices
Term
 oblique prism
Definition
 lateral edges arent parallel to bases
Term
 surface area
Definition
 sum of area of all faces
Term
 lateral area
Definition
 sum of area of all lateral faces
Term
 volume
Definition
 number of cubic units in a solid
Term
 great circle
Definition
 intersection of sphere in a plane containing center of sphere
Term
 prism
Definition
 polyhedron with 2 congruent parallel bases, lateral faces are parallelograms, height is parallel to bases
Term
 cylinder
Definition
 solid w/ congruent circle bases
Term
 pyramid
Definition
 polyhedron which base is a polygon, lateral faces are triangular w/ common vertex
Term
 cone
Definition
 solid w/ circular base and vertex at top
Supporting users have an ad free experience!