Word Problems

1
Word Problems

• Perimeter
• and
• Circumference of Circles

2
If the perimeter of a square is 60 inches, how
long is each side?

• Perimeter is the distance around an object.
• Square has 4 equal sides
• Divide the Perimeter by 4
• Each side measures 15 in.

P 60 in.
3
If the perimeter of a square is 180 inches, how
long is each side?

• Perimeter is the distance around an object.
• Square has 4 equal sides
• Divide the Perimeter by 4
• Each side measures 45 in.

P 180 in.
4
A rectangular piece of board is 57.5 cm by
76.3 cm. What is the perimeter of the board?
76.3 cm
57.5 cm
5
A rectangular piece of bard is 62.4 cm by 57.3
cm. What is the perimeter of the board?
62.4 cm
57.3 cm
6
5. A wooden fence is to be built around a 22m by
48m lot. How many meters of fencing will be
needed? If the wood for the fence costs 25.00
per meter, what will the wood for the fence cost?

• Two things to do here!
• First find the Perimeter.
• Now multiply the Perimeter by the cost per
  meter.

7
6. A wooden fence is to be built around a 46m by
70m lot. How many meters of fencing will be
needed? If the wood for the fence costs 22.50
per meter, what will the wood for the fence cost?

• Two things to do here!
• First find the Perimeter.
• Now multiply the Perimeter by the cost per
  meter.

8
7. The minute hand on a clock is 8cm long. What
distance does the tip travel in one complete
rotation, to the nearest centimeter.
Hands are the radius
Dont forget to round
9
8. The hour hand on a clock is 6cm long. What
distance does the tip travel in one complete
rotation, to the nearest centimeter.
Hands are the radius
Dont forget to round
10
9. Mario is fencing the area shown below. If
all measurements are given in feet, how many feet
of fencing will he need?
Now ADD up everything On the outside !!!
If this is
This is Half of A Circle

• Fencing goes around a Perimeter.
• First find the measurements of the missing
  sides.

6
5
This side is 9
11 6 5
9 3 6
so..
11
10. Jeff is fencing the area shown below. If
all measurements are given in feet, how many feet
of fencing will he need?
Now ADD up everything On the outside !!!
If this is
This is Half of A Circle

• Fencing goes around a Perimeter.
• First find the measurements of the missing
  sides.

9
3
This side is 11
10 7 3
11 2 9
so..
12
11. The distance around Venus is about 38,013
km. What is the equatorial diameter of Venus?

• In this case, you are not looking for the
  circumference, but the diameter!!
• So, DIVIDE the circumference by pi.

13
12. The distance around Mars is about 21,344 km.
What is the equatorial diameter of Mars?

• In this case, you are not looking for the
  circumference, but the diameter!!
• So, DIVIDE the circumference by pi.