|
Sometimes a picture or diagram gives you
all the information you need to solve a problem. You
just need to know how to translate that information to an
expression.
Example
1:
A rectangle has a perimeter of 48 inches and the length is 14 inches; find the width.
We can translate that diagram into this equation:
|
|
|
Because I know the
perimeter of a rectangle is equal to
the sum of all four sides...... |
P = w + w + l + l
48 = w + w + 14 + 14
48 = w + w + 28
48 - 28 = w + w + 28 - 28
20 = w + w
20 = 2w
20/2 = 2w/2
10 inches = w |
Example 2: Using a protractor, find the measure of angle
a.
|
We can translate this picture
into a numeric expression also by measuring the angle with the
protractor. m<a
= 65° |
|
|
So remember to use the
information given to translate diagrams or pictures to numeric
expressions. |
Ready to
Practice?
| 
