1. Objective - To use formulas to solve problems.
An algebraic equation that describes
a relationship between two or more
variables.

2. Find the area of the circle below using the formula
r = 4 in.

3. Use the formula F = ma to find the force, F, exerted
by a mass, m, of 12 kg accelerating at 5 m/s . 2

4. Use the formula, , to change the
temperature of 59 Fahrenheit to Celsius.

5. Mark borrows $500 from the bank at 6% simple
annual interest for 4 years. Use the formula,
I = Prt, to find what interest he owes.
Interest

6. Perimeter and Area Formulas Figure Perimeter Area
Square s
P = 4s s
Rectangle w
P = 2l + 2w l
Parallelogram

7. Perimeter and Area Formulas Figure Perimeter Area
Square s
P = 4s s
Rectangle w
P = 2l + 2w l a
Parallelogram h
P = 2a + 2b b b a h
Triangle

8. Perimeter and Area Formulas Figure Perimeter Area
Square s
P = 4s s
Rectangle w
P = 2l + 2w l a
Parallelogram h
P = 2a + 2b b b a h
Triangle

9. Perimeter and Area Formulas Figure Perimeter Area
Square s
P = 4s s
Rectangle w
P = 2l + 2w l a
Parallelogram h
P = 2a + 2b b b a h c
Triangle
P = a + b + c

10. Use formulas to find the perimeter and area of the figure below.1)
6 in.
5 in.
7 in.
Perimeter
Area
P = 2a + 2b
P = 2(6) + 2(7)
P =
P = 26 inches

11. Use formulas to find the perimeter and area of the figure below.2)
5 cm
6 cm
3 cm
9 cm
Perimeter
Area
P = a + b + c
P =
P = 20 cm

12. Find the area of the trapezoid given the formula .1)
5 m
7 m
6 m