Area of parallelograms, trapezoids and rhombuses

Answer Key - Grade 7 Math Worksheet - Challenge Me

Circle the best answer, or write your answer on the line.

1. 1.

   Pia's mural is a parallelogram with an area of 9.12 square meters and a base of 3.8 m. It shows a dancing robot. What is its height in meters?

   2.4
2. 2.

   Zee's window pane is a parallelogram with an area of 5/8 square foot and a base of 5/6 ft. Birds wave through it. What is its height in feet?

   3/4
3. 3.

   Jun's window pane is a trapezoid with area 5.1 square feet, height 1.5 ft and top side 2.4 ft. It glows at sunset. How long is its bottom side in feet?

   4.4
4. 4.

   Kira's kite is a rhombus with an area of 0.72 square meters. One diagonal is 0.9 m. It has a long tail. How long is the other diagonal in meters?

   1.6
5. 5.

   Luz's paper diamond is a rhombus with an area of 13.5 square cm. One diagonal is 4.5 cm. It is a little sparkly. How long is the other diagonal in cm?

   6
6. 6.

   Milo's paper diamond is a rhombus with an area of 8.4 square inches. One diagonal is 3.5 in. It twirls in the breeze. How long is the other diagonal in inches?

   4.8
7. 7.

   Noah's lawn is a trapezoid: parallel sides 6.5 m and 3.5 m, height 4 m. Each square meter needs 30 g of grass seed. Birds, look away. How many grams of seed does it need?

   600
8. 8.

   Pia's flower bed is a trapezoid: parallel sides 4.4 m and 2.6 m, height 2.4 m. Each square meter needs 2.5 liters of water. Daisies are thirsty. How many liters does it need?

   21
9. 9.

   Ren's mural is a trapezoid: parallel sides 5 m and 3 m, height 1.5 m. Each square meter needs 0.2 liters of paint. It shows a whale. How many liters of paint does it need?

   1.2
10. 10.

    Zee's lawn is a parallelogram with base 8 m and height 2.8 m. Each square meter needs 35 g of grass seed. The birds are watching. How many grams of seed does it need?

    784