Grade 4 homework Area and Perimeter

Define perimeter

• Perimeter is the distance all the way around the outside of a 2D shape.

• The perimeter is the distance all the way around the outside of a 3D shape.

• The perimeter is the distance all the way around the inside of a 2D shape.

Define area:

• The perimeter is the amount of space inside the boundary of a flat (3D) shape.

• The area is the amount of distance inside the boundary of a flat (2D) shape.

• The area is the amount of space inside the boundary of a flat (2D) shape.

What are some ways to estimate the area of irregular shapes, when using grid paper:

• Count all the ojects

• count all the full squares

• Estimate the partial squares

• Count to ten and guess the next number

Calculate the following mentally:

• 63mm²

• A shape with length: 18km and with of 8km has an area of:

• 128km²

• A shape with length: 7m and with of 10m has an area of:

• 144km²

• A shape with length: 9mm and with of 7mm has an area of:

• 70m²

• A shape with length: 64km and with of 2km has an area of:

A rectangular shape with a length of 7km and 3km has an area of​ (a)   and a perimeter of ​ (b)   . A square with a length of 9km has an area of ​ (c)   and a perimeter of​ (d)  

• 21km2
• 20km
• 12km2
• 200km
• 81km2
• 36km
• 63km
• 18km2

Estimate the area of shape D

• 24m²

• 33mm²

• 24mm²

• 34m²

Find the area of the shape

• 11m

• 23m²

• 9m²

Match the following

• irregular shape

• 
• regular shape

• 
• irregular shape

• 
• regular shape

• 

Find the area and perimeter of the shape:

• Area: 10cm²

  Perimeter: 20cm

• Area: 10cm²

  Perimeter: 10cm²

• Area: 20cm

  Perimeter: 10cm²

Which shape has the same area

• Z and X

• X and Y

• Y and Z