Area and Perimeter Formula Sheet

Decide whether you would add or subtract to find the composite area.

Groups:

(a) ADD

,

(b) SUBTRACT

• 
• 
• 
• 
• 
• 
• 

Order the steps for finding composite area.

• Add or subtract the areas

• Find the area of each simple shape using your formula sheet

• Identify the individual shapes (circle, square, rectangle, or triangle)

• Find the area formulas needed for each shape

Area of half circle? ​ (a)  

Area of Triangle? ​ (b)  

Total Area? ​ ​ (c)  

• 14.13
• 39
• 53.13
• 113.04
• 28.26
• 67.26
• 78

Area of circle? ​ (a)  

Area of square?​ (b)   ​

Total Shaded Area? ​ (c)  

• 254.34
• 324
• 69.66
• 1017.36
• 72
• 578.34

Find the total area of the shape.

Mathematical Equivalence

ON

Find the shaded area.

Mathematical Equivalence

ON

How can you find the perimeter of a composite shape?

• Add up every outside edge

• Add up all outside and inside edges

• Multiply all outside edges

• Add the outside edges, subtract the inside edges

Look at the image.

b

c

Subtract circumference from other sides

Find the circumerence of the half circle

Add the circumference to the other sides

Add the diameter to the other sides

Find whole circle's circumference

How many sides are there?​ (a)  

Combine the straight edges. ​ (b)  

Circumference of the half circle? ​ (c)  

Total Perimeter? ​ (d)  

• 3
• 2
• 4
• 28
• 18
• 34
• 9.42
• 18.84
• 37.42
• 43.42

Find the perimeter of the composite figure.

Mathematical Equivalence

ON