More on Perimeter

1. More on
Perimeter

2. What we know!
Perimeter is the distance around a figure or
object. We find perimeter by measuring
and adding the lengths each side.
Use your geoboard to re-create each
shape and find the perimeter. Record in
your math book.
P=40m
P=15m P=30m

3. Finding Perimeter Video

4. How would you find the
perimeter? Discuss.
4cm
8cm
P=24cm

5. Try Another…
You need to look at the information you
have.
If we are trying to figure out what the length
of side A is, then we
Need to look at the
Length of the side
Parallel to it.
A
Ex. 7m+1m=8m,
So side A=8m
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6. WHAT IS THE PERIMETER?
 FIND THE
LENGTH OF A
AND B. THEN
FIND THE
PERIMETER
A
B
A=3cm
B=2 cm
P=38cm
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7. DRAW THIS FIGURE AND FIND
THE PERIMETER
12mm(5+7=12)
10mm
(30-20=10)
P=84mm
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8. Let’s Practice
Complete the perimeter part of the
worksheet. Save the Area questions for
later in the week.

9.  Find ONLY the perimeter of each object.

10. Exit Ticket: Hand In Please

11. Homework and Extra Practice
 Check out the link to an online
Geoboard tool.