Show:
Area
Perimeter
Conversions
Bonus
For Fun
100
What does area measure?
The space inside the shape.
100
What does perimeter measure?
The distance around the shape.
100
1 m= ___ dm
10 dm.
100
Kate's living room has an area of 40 square meters. She bought a rug with an area of 40 square meters. When she took the rug home, it did not fit the room. Draw a picture to explain Kate's problem.
Kate did not calculate the perimeter. Just because she has the right area doesn't mean she has the right perimeter. Her floor could be 10 m x 4 m and the rug she bought could be 20 m x 2 m. Both have an area of 40 square meters but the first has a perimeter of 28 m and the second has a perimeter of 26 m.
100
What does width measure?
How wide the shape is.
200
How do you calculate the area?
Multiple the length and the width.
200
How do you calculate perimeter?
Add all of the sides.
200
113 cm= _____ m
1.13 m
200
Danny has a very unique picture. Its perimeter is 80 cm. It has six sides with four different lengths. The bottom of the mirror is the longest side. It is 20 cm. Draw what Danny's picture might look like. Label the sides.
One possible answer: 20 cm, 19 cm, 15 cm, 10 cm, 8 cm, 8 cm.
200
What does length measure?
How tall the shape is.
300
If you are given a number, how can you know if it is the area?
It should be in SQUARE units.
300
What is the perimeter of a square with a side length of 8 cm?
32 square centimeters.
300
113 m = ______ cm?
11300 cm
300
Mina's bedroom is 5 m long and 4 m wide. Her bed is in one corner. It is 2 m long and 1 m wide. Her desk is also 2 m long and 1 m wide. The desk is in the opposite corner. Draw Mina's room with the bed and desk in place. Find the area of the floor space not covered by furniture.
Area: 11 square meters.
300
Can you have more than one rectangle with the same area but different perimeter?
Yes. Example: A rectangle that is 5 cm long and 6 cm wide and a rectangle that is 10 cm long and 3 cm wide.
400
What is the area of a rectangle with a length of 6 cm and a width of 10 cm?
60 square centimeters.
400
What is the perimeter of a rectangle with a length of 15 cm and a width of 9 cm?
48 cm.
400
250 m= _____ km
0.25 km
400
When you are not sure if the area is exactly the right number and you estimated, what word do you use?
Approximate.
500
Shakira decided to tile her bedroom floor. The tiles she bought are 1 m long and 1 wide. Her floor is 12 m long and 20 m wide. How many tiles will she need?
The area is 240 square meters so she will need 240 tiles.
500
Mike built a rectangular dog pen that has a length of 21 m and a perimeter of 78 m. What is the width?
18 m.
500
650 mm= ______ dm?
6.5 dm.