Area Formulas Visit www.worldofteaching.com for more free powerpointswww.worldofteaching.com Area: Is the # of square units needed to cover a surface.

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Presentation transcript:

Area Formulas Visit for more free powerpointswww.worldofteaching.com Area: Is the # of square units needed to cover a surface.

Free powerpoint template: 2 Don’t Get Scared!!! Evil mathematicians have created formulas to save you time. But, they always change the letters of the formulas to scare you!

Free powerpoint template: 3 Area Area is the ENTIRE INSIDE of a shape It is always measured in “squares” (sq. inch, sq ft)

Free powerpoint template: 4 AREA Square units means that “that” many squares fit inside that shape (if measured in feet…it’s feet…if meters…it’s meters. In this example the area is 4 square units…note 4 squares fit) 1 2 units (ft, in, m) 2 3 4

Free powerpoint template: 5 Area of a Rectangle The area (A) of a rectangle is the product of the length ( l ) and width ( w ). A = lw l w

Example: Free powerpoint template: 6 3in 12 in When Solving Equations ALWAYS: 1. Write the formula 2. Substitute (numbers for variables) 3. Then Solve using order of operations!! A = lw A = 3 (12) A = 36 Don’t forget your units!!! in 2

Free powerpoint template: 7 Area of a Square The area (A) of a square is the length of a side ( s ) squared. A = s 2 s s

Example: Free powerpoint template: 8 7mm A = S 2 A = 7 2 A = 7 (7) A = 49 mm 2

Find the area of the shaded region. Free powerpoint template: cm 11cm 3cm 5cm