Geometry - Chapter 1

Front 1

Line

Back 1

A straight one-dimensional figure that extends infinitely in both directions

Front 2

Plane

Back 2

A flat surface that extends infinitely in all directions

Front 3

Collinear

Back 3

Points that lie in the same plane

Front 4

Coplanar

Back 4

Points that lie in the same plane

Front 5

Line Segment

Back 5

Part of a line that has two points

Front 6

Distance Formula- What it's used for and the formula

Back 6

Finding the distance between the endpoints

Front 7

Ray

Back 7

A line with a single endpoint that extends infinitely in one direction

Front 8

Midpoint Formula- what it's used for and the formula

Back 8

Finding the midpoint of a segment

Front 9

Acute Angle

Back 9

An angle that equals less than 90 degrees

Front 10

Obtuse Angle

Back 10

An angle that equals more than 90 degrees

Front 11

Right Angle

Back 11

An angle that equals 90 degrees

Front 12

Bisector

Back 12

A line that divides something into two equal parts

Front 13

Supplementary angles

Back 13

Two angles with the sum of 180 degrees ([non]adjacent)

Front 14

Complimentary angles

Back 14

Two angles with the sum of 90 degrees ([non]adjacent)

Front 15

Perpendicular angles

Back 15

Lines that are at right angles to each other

Front 16

Adjacent angles

Back 16

Share a common side, has a common vertex, and no common interior points

Front 17

Linear Pair

Back 17

Adjacent angles that form opposite rays

Front 18

Vertical Angles

Back 18

Nonadjacent angles that are formed by two intersecting lines (are congruent)

Front 19

Polygon

Back 19

A closed figure that is formed by sides and is named by its vertices (in consecutive order)

Front 20

Equilateral

Back 20

All congruent sides

Front 21

Equiangular

Back 21

All angles are congruent

Front 22

Regular Polygon

Back 22

Both equiangular and equilateral

Front 23

Circle

Back 23

A 3-dimensional object shaped like a ball

Front 24

Square

Back 24

A solid figure with many plane faces

Front 25

Rectangle

Back 25

A polyhedron whose faces are identical regular polygons

Front 26

Trapezoid

Back 26

A solid object with two identical ends and flat sides

Front 27

Triangle

Back 27

A polyhedron formed by connecting a polygonal base and a point

Front 28

Parallelogram

Back 28

A quadrilateral with two pairs of parallel sides

Front 29

Regular Polygon

Back 29

A=1/2aP

Front 30

Pythagorean Theorem

Back 30

a^2+b^2=c^2

Front 31

Polyhedron

Back 31

V=Bh

T=Ph+2B

Front 32

Regular Polyhedron

Back 32

V=1/3Bh

T=1/2 P(slanted height)l+B

Front 33

Prism

Back 33

V=(pi)r^2h

T=2(pi)rh+2(pi)r^2

Front 34

Pyramid

Back 34

V=1/3(pi)r^2h

T=(pi)r(slanted height)l+(pi)r^2

Front 35

Cylinder

Back 35

V=4/3(pi)r^3

T=4(pi)r^2

Front 36

Circle

Back 36

A=(pi)r^2

Front 37

Square

Back 37

A=s^2

Front 38

Rectangle

Back 38

A=bh

Front 39

Trapezoid

Back 39

A=1/2(b1+b2)h

Front 40

Parallelogram

Back 40

A=bh

Front 41

Regular Polygon

Back 41

A=1/2aP

Front 42

Triangle

Back 42

A=bh/2 or A=1/2bh