Week 11 · Area and perimeter
Friday
Freddy's square game
// Cover it with squares, walk around the edge
⏱ about 15 min
Friday: Freddy's square game
Freddy the Frog hops across a patio of square stones.
"Ribbit! Each stone is one square foot," he says.
"Let us play a game of area and perimeter."
Hazel straightens her scarf. "Area covers. Perimeter goes around," she says.
Bennie nods. "And we can multiply or break apart to find area."
Game 1: Count and multiply
FIND THE AREA
- Read the question.
- Tap your answer.
How many unit squares cover this rectangle?
What is the area in square feet?
What is the area in square centimeters?7 × ? = 56
Game 2: Break it apart
SPLIT AND ADD
- Read the question.
- Tap your answer.
8 × 7 = 8 × 5 + 8 × ?9 × 5 + 9 × 3 = ?
A patio has a 6 by 2 part and a 3 by 4 part. Total area?
Game 3: Walk around
FIND THE PERIMETER
- Read the question.
- Tap your answer.
What is the perimeter in feet?
What is the perimeter in meters?A triangle pond has sides 8, 6 and 10 feet. What is its perimeter?
7 + 3 + 7 + ? = 20
ORDER BY AREA
- Find the area of each rectangle.
- Put them from smallest area to biggest.
11st
22nd
33rd
44th
Game 4: True or false?
Check each sum and product.
| Sentence | True or false? |
|---|---|
| Area is counted in square units. | ? |
| 10 + 4 + 10 + 4 = 28 | ? |
| 8 × 7 = 8 × 5 + 8 × 2 | ? |
| A 1 by 12 rectangle and a 3 by 4 rectangle have the same perimeter. | ? |
WHY THIS EXERCISEThey have the same area, 12, but perimeters 26 and 14.
Try it
Find a floor, patio or game board with squares.
Count the squares across and down.
Multiply to find the area.
Count the edges all the way around for the perimeter.
Count the squares across and down.
Multiply to find the area.
Count the edges all the way around for the perimeter.
Draw a patio of square stones and write its area and perimeter.
Ribbit! Tomorrow is a Number Hunt for area and perimeter.