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Finding the Area of Parallelograms: Lesson 4

This lesson teaches how to find the area of parallelograms using base and height. Step-by-step examples and vocabulary definitions are provided.

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Finding the Area of Parallelograms: Lesson 4

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  1. Transparency 4 Click the mouse button or press the Space Bar to display the answers.

  2. Splash Screen

  3. Example 4-2c Objective Find the areas of parallelograms

  4. Example 4-2c Vocabulary Base The side of a parallelogram or trapezoid that is perpendicular to the height

  5. Example 4-2c Vocabulary Height The length of the segment perpendicular to the base with endpoints on opposite sides. In a triangle, the distance from a base to the opposite vertex

  6. Example 4-2c Vocabulary Parallelogram A quadrilateral with opposite sides parallel and opposite sides congruent

  7. Lesson 4 Contents Example 1Find the Area of a Parallelogram Example 2Find the Area of a Parallelogram

  8. Example 4-1a Find the area of the parallelogram.  6.4 cm A = 7.5 cm Write formula for area of parallelogram Replace b with 7.5 cm Replace h with 6.4 cm 1/2

  9. Example 4-1a Find the area of the parallelogram.  6.4 cm A = 7.5 cm Multiply numbers Answer: cm2 A = 48 Multiply units 1/2

  10. Example 4-1b Find the area of the parallelogram. Answer: A = 52 in2 1/2

  11. Example 4-2a Find the area of the parallelogram A = 8 cm  4.5 cm Write formula for area of parallelogram Replace b with 8 Replace h with 4.5 2/2

  12. Example 4-2a Find the area of the parallelogram A = 8 cm  4.5 cm Multiply numbers Answer: cm2 A = 36 Multiply units 2/2

  13. Example 4-2c Find the area of the parallelogram to the right. Answer: A = 10.8 m2 2/2

  14. End of Lesson 4 Assignment

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