Area and Perimeter of Triangles

​The formula for the area of a triangle is 1/2 times the base times the height.

Area= 1/2bh

Let's try it!

The base of this triangle is 10, the height is 7.

A= 1/2xbxh

A= 1/2 x 10 x 7

A= 35 square units

Multiple Choice

What is the area?

• 45

• 25

• 50

• 35

Multiple Choice

The triangle has base b=5 meters and height h=4 meters what is the area?

• 5

• 10

• 12

• 47

Multiple Choice

The triangle has base b=2 yards and height h=6 yards, what is the area?

• 2

• 8

• 6

• 10

​When finding the perimeter of a triangle we just all all sides!

P= a+b+c

P= 3+6+4

P= 13cm

Easy right? Let's do some practice problems :)

Multiple Choice

What is the Perimeter?

• 24

• 34

• 15

• 37

Multiple Choice

Find the perimeter.

• 45

• 64

• 54

• 58

​Now let's combine the two!

​Work these out on a piece of paper, SHOW YOUR WORK!

Open Ended

What is the Perimeter and Area of this Triangle?

​Sneak Peak of what we will be learning next.