using mathematics skills. lesson 2 determining area and volume
TRANSCRIPT
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Using Mathematics Skills
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Lesson 2
Determining Area and Volume
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Next Generation Science/Common Core Standards Addressed!
CCSS.Math.Content.8 .EE.A.4 - Perform operations with numbers expressed in scientific notation, including problems where both decimal and scientific notation are used. Use scientific notation and choose units of appropriate size for measurements of very large or very small quantities (e.g., use millimeters per year for seafloor spreading). Interpret scientific notation that has been generated by technology.
CCSS.Math.Content.8.EE.B.5 - Graph proportional relationships, interpreting the unit rate as the slope of the graph. Compare two different proportional relationships represented in different ways. For example, compare a distance-time graph to a distance-time equation to determine which of two moving objects has greater speed.
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Agriculture, Food and Natural Resources Standards Addressed!
PST.04.02. Determine structural requirements, specifications and estimate costs for AFNR structures
Sample Measurement: The following sample measurement strands are provided to guide the development of measurable activities (at different levels of proficiency) to assess students’ attainment of knowledge and skills related to the above performance indicator. The topics represented by each strand are not all-encompassing.
PST.04.02.01.a. Summarize and categorize the information needed to complete a bill of materials and cost estimate for an AFNR structure.
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Bell Work
What are some agricultural occupations which might require math skills to determine area and volume?
What are some examples of problems common to these occupations
Have many of you have had to use mathematical skills to complete a job?
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Student Objectives
Describe the methods used to calculate the area of various shapesIdentify the application of determining areas and distancesDescribe the methods used to calculate the volume of various shapesIdentify the applications of determining volume in agriculture
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Terms
AreaCircleEquilateral Isosceles TriangleLengthParallelogramRectangle
Right Triangle
Square
Scalene Triangle
Trapezoid
Triangle
Volume
Width
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Area
Defined as the measure of the amount of surfaceTwo dimensional Reported in Square inches, square feet, acres, square meters, etc.To convert square feet to acres, divide by 43,560
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How big is an Acre?
A little larger than a football field!
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Determining the Area of a Square
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Determining the Area of a Rectangle
If width = 1,000 ft
length = 2,000 ft
1,000 x 2000 ft = 20,000 ft2
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Determining the Area of a Triangle
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Kinds of Triangles
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Determining the Area of a Triangle
If base = 600 ft.
and height = 750 ft.
area = 600 x 700 2
area = 210,000 ft2
area = 4.82 acres
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Determining the Area of a Trapezoid
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Determining the Area of a Trapezoid
Base 1 = 2000 ft.
Base 2 = 3000 ft.
Height = 1500 ft.
2000 + 3000 x 1500
2
area = 3,750,000 ft2
area = 86 acres
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Determining the area of a Parallelogram
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Determining the area of a Parallelogram
Base = 400 ft
Height = 600 ft
Area = 240,000 ft2
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Determining the Area of a Circle
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Determining the Area of a Circle
Radius = 25 ft.
252 x 3.14 = 1962.5 ft2
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Volume
3 Dimensional
in “cubic” units
Important to remember - when converting from cubic feet to cubic
yard, divide by 27
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Determining Cubic Area
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Determining Cubic Area
Length = 100 ft
Width = 20 ft
Height = 20 ft
Volume = 40,000 ft3
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Determining the Volume of a Cylinder
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Determining the Volume of a Cylinder
If height = 10 feet
and radius is 3 feet
what is the volume of this cylinder?
32 x 3.14 x 10 = 282.6 ft3
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Determining the Area of a Cone
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Determining the Area of a Cone
Radius = 10 ft
Height = 20 ft
102 x 3.14 x 20
3
Volume = 209,333 ft3
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Determining the Area of a Sphere
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Determining the Area of a Sphere
Diameter = 6 feet
3.14/6 x 63 =
112.968 ft3
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The End!