1) What is the formula for the perimeter of a
rectangle?
2) What is the formula for area of a
rectangle?
3) If the area of a rectangle is 150 ft square
and the perimeter is 80 feet, then what is the
length and the width?
If the perimeter rectangle is 80, and the area
is 150, then what is the length and width.
What?
Why?
1) Solve the
perimeter
formula for w
or l.
2) Substitute
for w or L in
the area
formula and
simplify.
1) We want one
variable in our
quadratic
equation.
2) To write a
quadratic
equation that
we can solve.
3) Because
3) Set equal to every point on
0.
the x axis has a
y value that is 0
4) Solve for w.
4) We need w to
find l.
5) Substitute
w to find l.
5) Cuz Duh
6) Because you
6) Verify that
care about
the answer
whether you get
makes sense.
it or not.
As a Result?