Geometry Chapter 1

Front 1

Line

Back 1

made up of points, infinite

Front 2

Plane

Back 2

flat surface made of points

Front 3

Collinear

Back 3

points on the same line

Front 4

coplaner

Back 4

lines/points in the same plane

Front 5

Line segment

Back 5

Part of a line that has endpoints

Front 6

Distance formula

Back 6

find distance

Front 7

Mid-point Formula

Back 7

finding the length of the midpoint

Front 8

ray

Back 8

a line with a single endpoint (or point of origin) that extends infinitely in one direction

Front 9

acute angle

Back 9

small angle which is less than 90°

Front 10

obtuse angle

Back 10

It is more than 90° and less than 180°

Front 11

Right angle

Back 11

an angle of 90°

Front 12

bisector

Back 12

something that cuts an object into two equal parts.

Front 13

Supplementary angles

Back 13

either of two angles whose sum is 180°.

Front 14

complementary angles

Back 14

either of two angles whose sum is 90°.

Front 15

perpendicular lines

Back 15

is the relationship between two lines which meet at a right angle (90 degrees)

Front 16

adjacent angles

Back 16

Two angles are Adjacent when they have a common side and a common vertex (corner point) and don't overlap.

Front 17

linear pair

Back 17

The measure of a straight angle is 180 degrees, so a linear pair of angles must add up to 180 degrees.

Front 18

vertical angles

Back 18

each of the pairs of opposite angles made by two intersecting lines.

Front 19

Polygon

Back 19

a plane figure with at least three straight sides and angles, and typically five or more.

Front 20

equilateral

Back 20

having all its sides of the same length.

Front 21

equiangular

Back 21

having equal angles.

Front 22

regular polygon

Back 22

a polygon that is equiangular (all angles are equal in measure) and equilateral (all sides have the same length). Regular polygons may be convex or star.

Front 23

Area formula circle

Back 23

A= pie*r^2

Front 24

Area formula square

Back 24

A=s^2

Front 25

Area formula rectangle

Back 25

A=L*W

Front 26

Area formula trapezoid

Back 26

A=1/2(b2+b1)-h

Front 27

Area formula Triangle

Back 27

A=1/2*b*h

Front 28

Area formula parallelogram

Back 28

A=b*h

Front 29

Area formula regular polygon

Back 29

A=1/2 * perimeter * apothem

Front 30

Pythagorean theorem

Back 30

A^2 + B^2 = C^2

Front 31

Polyhedron

Back 31

a solid figure with many plane faces, typically more than six.

Front 32

Regular Polyhedron

Back 32

known as platonic solids

Front 33

Prism

Back 33

a prism is a transparent optical element with flat, polished surfaces that refract light.

Front 34

Pyramid

Back 34

a monumental structure with a square or triangular base and sloping sides that meet in a point at the top

Front 35

Cylinder

Back 35

the surface formed by the points at a fixed distance from a given straight line called the axis of the cylinder. It is one of the most basic curvilinear geometric shapes.

Front 36

Cone

Back 36

a three-dimensional geometric shape that tapers smoothly from a flat base

Front 37

Sphere

Back 37

a perfectly round geometrical object in three-dimensional space that is the surface of a completely round ball

Front 38

Vol. and surface area of Prism

Back 38

S= 2(wh+lw+lh)

V=lwh

Front 39

Vol. and surface area of pyramid

Back 39

S=2bs+b2

V=1/3b^2h

Front 40

Vol. and surface area of Cylinder

Back 40

V= pie*r^2*h

S=2*pie*r^2+2*Pie*r*h

Front 41

Vol. and surface area of Cone

Back 41

V=1/3*pie*r^2*h

S=Pie*r square root of r^2+h^2

Front 42

Vol. and surface area of Sphere

Back 42

V=4/3*Pie*r^2

S=4*Pie*r^2