Area of a Triangle

Area of a Triangle

Area of a triangle is HALF the area of a rectangle.










Base and Height are always perpendicular.

Multiple Choice

To find the area of a triangle, you need to know the _________ and ________.

• sides and sides

• base and height

• bottom and top

• length and width

Multiple Choice

The height has to be ______ to the base.

• parallel

• criss crossed

• perpendicular

• curved

Multiple Choice

Which number is the height?

• 3

• 3.1

• 1.5

Multiple Choice

Which number is the base?

• 3

• 3.1

• 1.5

Multiple Choice

What is the height?

• 14

• 13.2

• 5

Multiple Choice

What is the base?

• 14

• 13.2

• 5

Calculating Area of a Triangle

1. Identify the base and height

2. Substitute into the formula

3. Evaluate

4. Write your answer with Units²

Multiple Select

What is the formula to find the area of a triangle? (choose all that apply)

• A = bh

• $$A\ =\ \frac{b\times h}{2}$$  

• $$A\ =\frac{1}{2}bh$$  

• $$\ A\ =\ h\left(b\ +\ b\right)\div2$$  

Multiple Choice

What is the area?

• 12 cm²
• 14
• 14 cm²
• 24 cm²

Multiple Choice

• 108 cm
• 540 cm
• 108 cm²
• 54 cm²

Multiple Choice

Find the area of the figure:

• 30 ft²
• 60 ft²
• 16 ft²
• 36 ft²

Multiple Choice

What is the area of the triangle?

• $$70\ m^2$$

• $$140\ m^2$$

• $$60\ m^2$$

• 70 m

Multiple Choice

Find the area of the triangle.

• 96 in²

• 48 in²

• 20 in²

Multiple Choice

Find the area?

• 15 in²
• 30 in²
• 15 in
•  30 in

Multiple Choice

Find the area of the triangle.

• 5 cm²

• 10 cm²

• 7 cm²

Fill in the Blank

What is the area? (don't include the units)

Fill in the Blank

What is the area? (don't include unit of measure)

Fill in the Blank

What is the area? (don't include the units)

Fill in the Blank

What is the area? (don't include the units)