The formula '1/2 × diagonal1 × diagonal2' works for finding the area of some quadrilaterals. Which of the following explains why it cannot be used for all parallelograms?

The diagonals of a general parallelogram are not perpendicular bisectors of each other.

Parallelogram Area

6th GradeMath42 min

aligned to Illustrative Mathematics

I can calculate the area of parallelograms by composing rectangles.

6 min

Area of a parallelogram | Perimeter, area, and volume | Geometry | Khan Academy

Khan Academy

8 min

Key concepts students will learn:

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The area of a parallelogram can be found by multiplying the base by the height.
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The height of a parallelogram is the perpendicular distance between the base and its opposite side.
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A parallelogram can be divided into two congruent triangles, and its area is twice the area of one of these triangles.

13 min

8 questions • Multiple choice & Short answer & True/false & Fill in the blank

5 min

“A parallelogram has a base of 8 cm and a height of 4 cm. What is the area of the parallelogram?”

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