Area of Triangles and Quadrilaterals

Which of the following is the correct formula to find the area of a parallelogram?

Tags

CCSS.6.G.A.1

Find the area of the parallelogram.

• 12 units²
• 10 units²
• 13 units²
• 6 units

Tags

CCSS.6.G.A.1

Find the area of the parallelogram in square inches.

Mathematical Equivalence

ON

Tags

CCSS.6.G.A.1

What is the area of the parallelogram in square centimeters?

Remember that height comes at a right angle! Look for the right angle FIRST, and then decide the base and height.

Mathematical Equivalence

ON

Tags

CCSS.6.G.A.1

Which of the following is the correct formula to find the area of a triangle?

Tags

CCSS.6.G.A.1

Which expression below will find the Area of this triangle?

Tags

CCSS.6.G.A.1

True or False? Any side of a triangle can be the base side.

• True--it doesn't have to be the bottom side in the orientation of the triangle. You can turn the triangle until the base is the bottom if you want.

• False--the base can only be the side on the bottom.

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

Tags

CCSS.6.G.A.1

A triangle height has to be ______ to its base.

• parallel (lines that would never intersect)

• criss crossed

• perpendicular (meeting at a right angle)

• curved

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, because it's connected to the height by a right angle?

• 18 cm

• 14 cm

• 8 cm

• 6 cm