10Th Grade Geometry Chapter 6

Front 1

polygon

Back 1

A plane figure formed by coplanar segments such that 1. each segment intersects exactly two other segments, one at each endpoint; and 2. no two segments with a common endpoint are collinear.

Front 2

sides of a polygon

Back 2

has to be 3 or more

Front 3

vertex

Back 3

the endpoint of a side

Front 4

convex

Back 4

the sides don't end

Front 5

non-convex, concave

Back 5

a non convex

Front 6

equilateral polygon

Back 6

all the sides are congruent

Front 7

equiangular polygon

Back 7

all the interior angles are congruent

Front 8

regular polygon

Back 8

A polygon that is both equiangular and equilateral.

Front 9

diagonal of a polygon

Back 9

a segment that joins two nonconsecutive vertices

Front 10

parallelogram

Back 10

A quadrilateral with both pairs of opposite sides parallel.

Front 11

rhombus

Back 11

A quadrilateral with four congruent sides.

Front 12

rectangle

Back 12

A quadrilateral with four right angles.

Front 13

square

Back 13

A quadrilateral with four right angles and four congruent sides.

Front 14

trapezoid

Back 14

A quadrilateral with exactly one pair of parallel sides, called bases. The other sides are legs.

Front 15

bases of a trapezoid

Back 15

the parallel sides

Front 16

base angles of a trapezoid

Back 16

two pairs of angles whose common side is the base of a trapezoid

Front 17

legs of a trapezoid

Back 17

the nonparallel sides

Front 18

isosceles trapezoid

Back 18

A trapezoid with congruent legs.

Front 19

mid-segment of a trapezoid

Back 19

a segment that connects the midpoints of two sides of a triangle

Front 20

kite

Back 20

A quadrilateral that has two pairs of congruent sides, but opposite sides are not congruent.

Front 21

image

Back 21

the new figure that results from the transformation of a figure in a plane

Front 22

preimage

Back 22

the original figure in the transformation of figure in a plane

Front 23

transformation

Back 23

the operation that maps or moves a preimage onto an image

Front 24

isometry

Back 24

A transformation that maps every segment to a congruent segment. Also called a congruence mapping.

Front 25

reflection

Back 25

a type of transformation that uses a line that acts like a mirror, called the line of reflection, with an image reflected in the line

Front 26

line of reflection

Back 26

acts like a mirror

Front 27

line of symmetry

Back 27

a line that a figure in the plane has if the figure can be mapped out onto itself nu a reflection in the line

Front 28

rotation

Back 28

a type of transformation in which a figure is turned about a fixed point called the center of rotation

Front 29

center of rotation

Back 29

a fixed point

Front 30

angle of rotation

Back 30

the angle formed when rays are from the center of rotation to a point and its image.

Front 31

rotational symmetry

Back 31

a figure in the plane has rotational symmetry if the figure can be mapped onto itself by a rotation of 180 or less

Front 32

translation

Back 32

a type of transformation

Front 33

vector

Back 33

a quantity that has both direction and magnitude and is represented by an arrow drawn between two points

Front 34

initial point

Back 34

starting point

Front 35

terminal point

Back 35

ending point

Front 36

component form

Back 36

the form of a vector that combines the horizontal and vertical components of the vector

Front 37

glide reflection

Back 37

a type of reflection

Front 38

composition

Back 38

the result when two or more transformations are combined to produce a single transformation

Front 39

frieze pattern or border pattern

Back 39

a pattern that extends to the left and right in such a way that the pattern can be mapped onto itself by a horizontal translation