ENSURES THAT NO MORE THAN TWO QUESTIONS SHOULDINCLUDE “NOT ENOUG...
2002, ensures that no more than two questions shouldinclude “not enough information is given” as a correct
1
answer choice. Given this fact, it is important for you to−1
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6
−2
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−6
0
1
5
4
2
3
pay attention to how many times you select this answer−
1
choice. If you find yourself selecting the “not enoughinformation is given” for the third time, be sure to checkthe other questions for which you have selected thischoice because one of them must be incorrect.−
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The current GED has an increased focus on “math ineveryday life.” This is emphasized by allowing the use of−
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a calculator on Part I as well as by an increased empha-−6
sis on data analysis and statistics. As a result, gridded-response questions and item sets are more common. Thenumber of item sets varies.3 8 7
Areaof a:square Area = side2
rectangle Area = length widthparallelogram Area = base heighttriangle Area =1
2
base heighttrapezoid Area =
1
2
(base1
+ base2
) heightcircle Area = πradius2
; πis approximately equal to 3.14Perimeterof a:square Perimeter = 4 siderectangle Perimeter = 2 length + 2 widthtriangle Perimeter = side1
+ side2
+ side3
Circumferenceof a circle Circumference = πdiameter; πis approximately equal to 3.14Volumeof a:cube Volume = edge3
rectangular solid Volume = length width heightsquare pyramid Volume =1
3
(base edge)2
heightcylinder πradius2
height πis approximately equal to 3.14cone Volume =1
3
πradius2
height; πis approximately equal to 3.14Coordinate Geometry distance between points = (x2
– x1
)2
+ (y2
– y1
)2
; (x1
,y1
) and (x2
,y2
) are two points in a planey
–
slope of a line =y
2
x
1
; (x1
,y1
) and (x2
,y2
) are two points on the linePythagorean Relationship a2
+ b2
= c2
; a and b are legs and c is the hypotenuse of a right triangle. . . +
x
n
, where the x's are the values for which a mean is desired, Measures of mean=
x
1
+
x
2
+
n
Central Tendency and nis the total number of values for x.median= the middle value of an odd number of orderedscores, and halfwaybetween the two middle values of an even number of orderedscores.Simple Interest interest = principal rate timeDistance distance = rate timeTotal Cost total cost = (number of units) (price per unit)Adapted from official GED materials.C H A P T E R41
Measurement
and Geometry
THE GED Mathematics Test emphasizes real-life applications ofmath concepts, and this is especially true of questions about meas-urement and geometry. This chapter will review the basics of meas-urement systems used in the United States and other countries,performing mathematical operations with units of measurement, andthe process of converting between different units. It will also reviewgeometry concepts you’ll need to know for the exam, such as prop-erties of angles, lines, polygons, triangles, and circles, as well as theformulas for area, volume, and perimeter.T
H E U S E O F
measurement enables you to form a connection between mathematics and the real world.To measure any object, assign a unit of measure. For instance, when a fish is caught, it is often weighedin ounces and its length measured in inches. This lesson will help you become more familiar with thetypes, conversions, and units of measurement.Also required for the GED Mathematics Test is knowledge of fundamental, practical geometry.Geometryis thestudy of shapes and the relationships among them. A comprehensive review of geometry vocabulary and con-cepts, after this measurement lesson, will strengthen your grasp on geometry.3 8 9