L1 · Area of a parallelogram

1. 1.

   Find the area of the parallelogram.

   Answer. 48 square cm

   A = b × h = 8 × 6 = 48 square cm.

2. 2.

   Find the area of the parallelogram.

   Answer. 72 square cm

   A = b × h = 8 × 9 = 72 square cm.

3. 3.

   Find the area of the parallelogram.

   Answer. 117 square cm

   A = b × h = 13 × 9 = 117 square cm.

4. 4.

   Find the area of the parallelogram.

   Answer. 44 square in

   A = b × h = 11 × 4 = 44 square in.

5. 5.

   Nora cuts a parallelogram with base 7 m and height 12 m from paper, then cuts an identical second one. What is the total paper area used?

   Answer. 168 square m

   One parallelogram is 84 square m. Two of them: 168 square m.

6. 6.

   Theo cuts a parallelogram with base 7 cm and height 4 cm from paper, then cuts an identical second one. What is the total paper area used?

   Answer. 56 square cm

   One parallelogram is 28 square cm. Two of them: 56 square cm.

7. 7.

   Owen cuts a parallelogram with base 15 in and height 3 in from paper, then cuts an identical second one. What is the total paper area used?

   Answer. 90 square in

   One parallelogram is 45 square in. Two of them: 90 square in.

8. 8.

   Elena cuts a parallelogram with base 16 m and height 3 m from paper, then cuts an identical second one. What is the total paper area used?

   Answer. 96 square m

   One parallelogram is 48 square m. Two of them: 96 square m.

9. 9.

   Owen cuts a parallelogram with base 11 m and height 5 m from paper, then cuts an identical second one. What is the total paper area used?

   Answer. 110 square m

   One parallelogram is 55 square m. Two of them: 110 square m.

10. 10.

    Grace cuts a parallelogram with base 15 m and height 8 m from paper, then cuts an identical second one. What is the total paper area used?

    Answer. 240 square m

    One parallelogram is 120 square m. Two of them: 240 square m.

11. 11.

    Think

    Malik used the slanted side 16 instead of the height 9 and got 224. What is the actual area of a parallelogram with base 14 cm and height 9 cm?

    Answer. 126 square cm

    Height is perpendicular, not slanted. A = 14 × 9 = 126 square cm.

12. 12.

    Think

    Nora used the slanted side 11 instead of the height 11 and got 99. What is the actual area of a parallelogram with base 9 cm and height 11 cm?

    Answer. 99 square cm

    Height is perpendicular, not slanted. A = 9 × 11 = 99 square cm.

Original extra practice. Keys are computed from the items, not guessed.