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

2. Free powerpoint template: www.brainybetty.com 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!

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

4. Free powerpoint template: www.brainybetty.com 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

5. Free powerpoint template: www.brainybetty.com 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

6. Example: Free powerpoint template: www.brainybetty.com 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

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

8. Example: Free powerpoint template: www.brainybetty.com 8 7mm A = S 2 A = 7 2 A = 7 (7) A = 49 mm 2

9. Find the area of the shaded region. Free powerpoint template: www.brainybetty.com 9 9 cm 11cm 3cm 5cm