Measurement

Circumfrence

Definition

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The perimeter of a circle. Or the distance around something.

Learn more about circumfrence here.

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The Four W's

Why?

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Why do we measure?

Where?

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Our "why" helps us determine the where.. where are we measuring? For example, area, perimeter, volume, etc.

What?

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What tools will you use?

How?

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How you measure (repeating a unit with no gaps). How many of the UNIT, not just where it ends.

Surface Area

Formulas

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Right Rectangular PyramidSA=B+1/2psRight Circular ConeSA=3.14r^2+3.14rsRectangular Prism (Area of Base x 2) + LxWx4Cylinder2B+phCubeAx6

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Click the link for examples of pyramid surface area problems.

If you would like to practice your surface area skills, click on the link to access practice worksheets.

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Finding Area

Formulas

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Circle: A =3.14r^2Rectangle: A=bxhTriangle: A=1/2xbxhParallelogram: A=BxhSquare: A=x^2

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Why do we use square units when measuring area?

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-90 degree angles -Easy to visulize-Easy to define fractions of a square-Tesellates well-Straight lines

See how simple and easy it is using square units of measure.

To further your understanding of area, here are some practice worksheets.

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Perimeter

Definition

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The lengths measurement and is given in centimeters, feet, inches, etc. It is the total length around the given figure.

Learn how to find perimeter of different shapes here.

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Labeling Units

Perimeter

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Label perimeter with units.For example: Inches, Feet, or Meters

Area

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Squared

Surface Area

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Units squared

Volume

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When an object is a 3D figure, it must be labeled with cubed units.

Volume

Cylinders and Prisms

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Formula:V=Bh

Pyramids and Cones

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Formula:V=1/3Bh

Example Problem for Pyramid Volume

To further your understanding of volume, here are some practice worksheets.

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Pythagorean Theorem Formula

Watch this video to further your understanding of the Pythagorean Theorem.

For Pythagorean Theorem practice CLICK THE LINK.