Chapter 2MEASURING, PERIMATER, AREA, GRAPHS

By: Rain E. Burton and Alexia A. Bayer-Snyder

Review of Chapter

0Review Words-• Perimeter• Area• Data• Bar Graph• Line Graph

0Prerequisite Skills1. The area of a figure is measured in

square units.2. In a line graph, your connect the

data points with line segment.3. Need to find the perimeter of a

triangle with given side lengths.4. Need to be able to estimate on a

bar graph.5. Need to evaluate the expression

when x and y mean certain numbers.

2.1Measuring Lengths

Vocabulary

0 Inch0Foot0Yard0Mile0Millimeter0Centimeter0Meter0Kilometer

Review of Content0Using a ruler you can measure

the length of a segment. If a segment is 4 1/5 centimeters long it would be 42 millimeters long.Twelve inches are in one foot. Three

feet are in one yard. Thirty-six inches in one yard. 1760 yards are in one mile. 5280 feet are in one mile.

10 millimeters are in one centimeter. 100 centimeters are in one meter. 1000millimeter are in one meter. 1000 meters are in one kilometer.

Model Problem

0Switch 113 3/10 centimeters to millimeters.A. 1130 mmB. 1133 mmC. 1140 mm

2.2Perimeter and Area

Vocabulary

0Perimeter0Area

Review of Content

0To find the perimeter of a shape add each edge.

0To find the area of a square or rectangle multiply the width and height.

Model Problem

0Find the area and perimeter of the rectangle.

4 in

5 in

2.3Scale Drawings

Lesson 2.3

vocabulary Review of Content

0Scale Drawing0Scale

0 A scale drawing is the same shape as the original object but not the same size. The scale tells how the drawing’s dimensions and the actual dimensions are related.

Model Problem

01in : 2 feet 9 in : ftA. 20 feetB. 22feetC. 18 feet

2.4Frequency Tables and Line Plots

Lesson

0Vocabulary-0Data0Frequency Table0Line Plot

0You can organize data, or information by using a frequency table. A frequency table lists the number of times each item occurs in a data set. A line plot uses X marks above a number line to show the frequencies.

Model Problem0 Student Choices for Art ProjectPaintingPaintingPaintingSculptureDrawingPaintingSculpturePaintingDrawingSculptureSculpturePainting

How many painting, drawing, and sculpture are there.

Painting-Drawing-Sculpture-

2.5Bar Graphs

Vocabulary

0Bar Graph0Double Bar Graph

Review of Content

0 A bar graph uses the lengths of the bars to represent and compare data. A numerical scale is used to find the lengths of the bars.

cats

dogsfis

h

hamste

rs0

2

4

6

8

10

12

14

201020112012

Model Problem

0How many students parents have a ford in 2012?

ford

chevy

honda

elaphant0

2

4

6

8

10

12

14

201120122014

2.6Coordinates and Line Graphs

Vocabulary

0Axes0Coordinates 0Ordered Pair0Origin0Line Graph

Review of Content

• A graph shows a point on a coordinate grid. Each point is described by an ordered pair of numbers. The numbers are the coordinates of the point. The grid is formed by two number lines, one vertical and one horizontal, called axes. The axes intersect at the origin.

• A line graph represents data using points connected by line segments. Line graphs are often used to show change over time. You can make a break at the begging of the scale to focus on the interval where the data fall.

Model Problem

0What percent of students like ice cream in 2012?

A. 80%B. 75%C. 79%D. 81%

pizza

ice cr

eam

spaggetti

waterm

elon

0%

20%

40%

60%

80%

100%

201420122010

2.6Circle Graph

Lesson 2.6

0A circle graph is a graph that represents data as parts of a circle. The entire circle represents all of the data. You can make conclusions about the data in a circle graph based on the size of each section.

Sales

1st Qtr2nd Qtr3rd Qtr4th Qtr

Model Problem and Vocabulary

0Vocabulary-Circle Graph

0Model Problem-How many degrees are first quarter?

Sales

1st Qtr2nd Qtr3rd Qtr4th Qtr

2.8Mean Median Mode

(MMM)

Lesson 2.8

0Vocabulary-MeanMedianModeRange

0 Mean- The mean of a data set is the sum of the values divided by the number values.

0 Median- The median of the data set is the middle value when the values are written in numerical order.

0 Mode- The mode of the data set is the value that occurs most often.

0 Range- The range of a data set is the difference between the greatest value and the least value.

Model Problem

0The mean for the letters below.

23, 24, 53, 60, 75A. 46B. 47C. 50D. 62

The EndMATH IS AWESOME