Area Formulas Area Is the of square units

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

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: www. brainybetty. com 2

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

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 3 4 2 units (ft, in, m) Free powerpoint template: www. brainybetty. com 4

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

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

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

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

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