Formulas

Chapter 3, Lesson 8

Formulas Directions

Solve the problems.

1. Three towns-Lakeville, Macon, and Kiley-form a triangle on the map. If you were to ride from Lakeville to Macon to Kiley and back to Lakeville again, you would travel the perimeter of this triangle. The following equation describes this perimeter: P = A + b + c. Solve for a, the distance between Macon and Lakeville. Lakeville

h

On the same map of the three towns, solve for c, the distance between Kiley and Macon.

formula for the area of asquare for s to find the length of a side.

3. The

is

A

- s2. Solve

The formula for the volume of a cube is V = s3. Solve for s to find the length of an edge of the cube. 5.

A trapezoid is a 4-sided figure with 2 sides parallel and 2 sides not parallel.

The formula for the area

of atrapezoid

Note: Think of bland,b2each

is:

A = *lrtU, + b).

simple variable, such x or y. Don't confuse the lowered 1 and 2 with exponents. Solve the equation for h to

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as a

as

find the height of the trapezoid. for classroom

use

only'

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Algebra