Finding the Area of Triangles

What is the formula for the area of a triangle?

• A=bh

• A=1/2 bh

• A=1/2 (b₁+b₂) h

• A=πr²

The label for area is 

• units squared

•  units

• you do not need a label.

What is the area of the BLUE triangle?

• 21

• 42

• 84

• 168

What is the area of the composite shape?

• 40ft²

• 9ft²

• 49ft²

• 61ft²

Find the missing measurement

• A

• B

• C

• D

The area of this triangle is 72 cm², and the base is 10 cm. What is the height of the triangle?

• 14.4 cm

• 14.5 cm

• 12.4 cm

• 12.5 cm

Find the area of the triangles. Remember:- Base and height must form a right angle- Always divide by 2 on triangles

a

b

c

d

e

f

h

g

Find the area of the triangles. Remember:- Base and height must form a right angle- Always divide by 2 on triangles

a

b

c

d

e

f

h

g

• 2

• 3

• 4

• 6

Find the missing dimension

• b = 1.625 ft

• b = 7.2 ft

• b = 6.8 ft

• b = 6.5 ft