Area of a Triangle and Polygon

Area of Triangle

Practice!

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

What is the area?

• 9 m²

• 10 m²

• 20 m

• 20 m²

Multiple Choice

What is the area?

• 30 m²

• 11 m²

• 25 m

• 15 m²

Multiple Choice

A triangle height has to be ______ to its base.

• parallel (lines that would never intersect)

• criss crossed

• perpendicular (meeting at a right angle)

• curved

Multiple Choice

We know we can use ANY triangle side as the base, so long as we have a height marked perpendicular (at a right angle) to it.

Which side would be the best to use as the base of the triangle?

• 18 cm

• 14 cm

• 8 cm

• 6 cm

Multiple Choice

Find the area of the triangle.

• 20 cm²

• 56 cm²

• 28 cm²

• 27 cm²