Area Formulas Parallelograms and Triangles

Area of Parallelograms and Triangles

By Melissa Judy

the distance from the base to the opposite side or vertex.

Height

One of the sides of a shape. (usually the bottom)

Base

Base and Height

​***Base and Height must meet at a right angle!! (look for the tiny square)***

Multiple Choice

The base and height of a parallelogram must be...

• opposite

• perpendicular (at a right angle)

• parallel (at a wrong angle)

• a dashed line

Multiple Choice

Find the BASE of the parallelogram.

• 3 units

• 4 units

• 5 units

• 6 units

Multiple Choice

Find the BASE of the parallelogram.

• 3 units

• 3 1/2 units

• 5 units

• 6 units

• Answer Not Shown

Multiple Choice

Find the BASE & HEIGHT of the parallelogram.

• BASE: 8, HEIGHT: 7

• BASE: 8, HEIGHT: 4

• BASE: 7, HEIGHT: 4

Multiple Select

Find the BASE & HEIGHT of the parallelogram.

(Must choose 2 correct answers)

• HEIGHT: 1.5

• HEIGHT: 2

• HEIGHT: 4

• BASE: 4

• BASE: 2

Multiple Choice

Select the figure that shows the height that goes with the base of the triangle shown here.

Multiple Choice

If the base of the triangle is 9cm, then the height is ........?

• 6m

• 8cm

• 14cm

• 6cm

Multiple Choice

If the base of this triangle is 12 units, then the height is _______ units ?

• 9 units

• 4 units

• 5 units

Multiple Select

Find the BASE & HEIGHT of the parallelogram.

(Must choose 2 correct answers)

• BASE: 7 1/2

• BASE: 11

• HEIGHT: 8

• HEIGHT: 11

• HEIGHT: 7 1/2

Multiple Choice

Area is ___________________

• the distance around a shape.

• the amount of space inside a shape.

• the same for every shape.

Formulas!!!!

Match

Match the following

• Area of a Rectangle

• Area of a Parallelogram

• Area of a Triangle

A = l x w

A = b x h

A = 1/2( b x h )

• A = l x w

• A = b x h

• A = 1/2( b x h )

Multiple Choice

When measuring area, what label do you use?

• units
• units²
• units³

Multiple Choice

A parallelogram can be divided into two triangles.

• False

• True

Multiple Choice

What is the formula to find the area of a parallelogram?

• A = lxw

• A = bxh

• A = b+h

Multiple Choice

Two triangles can make a parallelogram

• True

• False

Multiple Choice

What is the formula for the area of a triangle

• A=bh

• A=lw

• A=s²

• A=1/2(bh)

Drag and Drop

What is the area of the parallelogram?

A=​

Placeholder

*​

Placeholder

A=​

Placeholder

*​

Placeholder

A=​

Placeholder

cm squared

Drag these tiles and drop them in the correct blank above

72 cm²

56 cm²

b

h

9 cm

7 cm

63

8 cm

1/2

Drag and Drop

Find the area of the parallelogram.

A=

A=​ ​

Placeholder

*​

Placeholder

A=​

Placeholder

*​

Placeholder

A=​

Placeholder

units squared

Drag these tiles and drop them in the correct blank above

h

6

2

12

5

7

3

18

b

1/2

Drag and Drop

Find the area of the parallelogram.

​

Placeholder

A=​

Placeholder

A= ​

Placeholder

units squared

Drag these tiles and drop them in the correct blank above

20

1/2*10*5

25

A= b*h

A=1/2 b*h

10*4

1/2 10*4

10*5

40

50

Multiple Choice

Find the area.

• 55 square feet
• 60 square feet
• 16 square feet
• 28 square feet

Multiple Choice

What is the area of the parallelogram above?

• 13 cm²

• 28.5 cm²

• 45.6 cm²

• 40 cm²

Multiple Choice

Find the missing measure of the parallelogram. 
HEIGHT = 20 feet
AREA = 120 feet²

• 10 feet
• 6 feet
• 8 feet 
• 12 feet

Drag and Drop

Find the area.

A=​

Placeholder

​ ​

Placeholder

A=1/2​

Placeholder

*​

Placeholder

A=​

Placeholder

units squared

Drag these tiles and drop them in the correct blank above

17 

20 

16 

1/2*b

h

5

4

10

b

Drag and Drop

Find the area of this triangle.

A= ​

Placeholder

A=​

Placeholder

*​

Placeholder

​

Placeholder

A=​

Placeholder

square feet

Drag these tiles and drop them in the correct blank above

150

100

35

1/2 bh

b*h

1/2

10

50

15

75

Drag and Drop

Find the area of the triangle.

A= ​

Placeholder

A=​

Placeholder

*​

Placeholder

*​

Placeholder

A=​

Placeholder

cm squared

Drag these tiles and drop them in the correct blank above

20 

56

27 

1/2 bh

1/2

8

7

28

6

bh

Drag and Drop

Find the area of the figure:

A=​

Placeholder

A=​

Placeholder

​

Placeholder

​

Placeholder

A=​

Placeholder

square feet

Drag these tiles and drop them in the correct blank above

60

16

36

1/2*b*h

1/2

10

6

30

b*h

__

Multiple Choice

Area of triangle?

• 17 units²
• 20 units²
• 10 units²
• 16 units²

Drag and Drop

Find the area of a triangle with a height of 4.6 mm and a base of 6.12 mm?

A=​

Placeholder

A=​

Placeholder

*​

Placeholder

​

Placeholder

A=

Placeholder

Drag these tiles and drop them in the correct blank above

14.076 mm squared

1/2*b*h

1/2

6.12

4.6

___

b*h

28.152

24

12