1. Mrs. Mundrick’s 6th Grade Math Class
Fun with Formulas

2. Geometry – Area of a Rectangle
Multiply Base (b) x Height (h) to get the Area of any square or rectangle.
b x h b= b= b=3
h=1
Total Area (bh) is 3 units wide x 1 unit high which = 3 square units and we have 3 squares in this rectangle.
1 x 1 = 1 square unit
1 x 2 = 2 square units
1 x 3 = 3 square units

3. Geometry – Rectangle Area
Multiply b x h to get the Area of any square or rectangle.
b x h b= b= b=3
h = 1
h = 2
Total Area (bh) is 3 x 2 = 6 square units and we have 6 squares in this rectangle.
1 x 1 = 1
square unit
2 x 1 = 2
square units
3 x 1 = 3
1 x 2 = 2
2 x 2 = 4 square units
3 x 2 = 6

4. Find the Area (A) of a Rectangle
Given: A = bh
b x h b= b= b=3
h = 1
h = 2
h = 3
Using the formulas above,
Find the Area of each of the small rectangles.
? square units

5. Perimeter (P) of a Rectangle
Given: P = 2b + 2h = 2bh = 2A
b x h b= b= b=3
h = 1
h = 2
h = 3
h = 4
Total Area = bh square units and we have bh squares inside of the largest rectangle.
Total Perimeter = 2bh units.
P = 2 x 1 x 1 = 2
P = 2 x 2 x 1 = 4
p = 2 x 3 x 1 = 6
P = 2 x 1 x 2 = 4
p = 2 x 2 x 2 = 8
p = 2 X 3 X 2 = 12
p = 2 X 1 X 3 = 6
p = 2 X 2 X 3 = 12
p = 2 X 3 X 3 = 18
p = 2 X 1 X 4 = 8
p = 2 X 2 X 4 = 16
p = 2 X 3 X 4 = 24

6. Geometry – Area & Perimeter
Find the Area & the Perimeter of the Largest & of the Smallest Rectangles below:
h x b b= b=2
h= 1
h = 2
h = 3
h = 4
h = 5
A = ? sq. units, P = ?

7. Circle Definitions
Pi, denoted π, is a special number that is a non-repeating decimal with no end.
(π ≈ …).
Use in place of Pi.
Radius, R, is half of the distance across the widest part of a circle.
Dimension, D, is the distance across the widest part of a circle.
Circumference, C, is the length around a circle.

8. Area & Circumference of a Circle
Given:
A = π x R²,
C = 2 x π x R
R = ½ x D
Find the Area and the Circumference
(hint: 1st find the Radius, R)
Write ALL answers on a piece of paper with your name on it and turn it in for Extra Credit!
D = 6